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omeli [17]
3 years ago
14

Solve for x: ax+by=c

Mathematics
2 answers:
Luba_88 [7]3 years ago
8 0
Hey there!

In order to solve these problems where you're given a bunch of variables and no numbers, all you have to do is push around the variables until you get what you're solving for (x) on one side of the = and the rest on the other side. This will be your answer. You can use multiplication, division, addition, and subtraction to solve. Remember that you have to what you do on one side to both sides. 

ax + by = c

\frac{ax}{a} + by =  \frac{c}{a}

(x + by)-by = \frac{c}{a}-by

x = \frac{c}{a}-by

Your answer will be \frac{c}{a}-by. 

Hope this helped you out! :-)
kiruha [24]3 years ago
6 0
Remember, we can do anything to an equiaotn as long as you do it to both sides


ax+by=c
minus by from both sides
ax=c-by
divide both sides by a
x=\frac{c-by}{a}
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Billy works at a toy store. He put 1,573 new toys on a shelf. At the end of the day customers bought 862 of those toys. How many
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Answer:

Seven-Hundred and Eleven

Step-by-step explanation:

1. Take 1,573 and subtract how many the customer bought

2. You get your answer of: 711

<em>1,573</em>

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<em>_____</em>

<em>711</em>

4 0
3 years ago
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Janie mad a 2.5 inch scale model of one of the tallest buildings in the world: Taipei 101. The scale for the model is 1/4 inch=
kifflom [539]

Answer:

1,670 feet

Step-by-step explanation:

Given that the scale is

1/4 inches : 167 feet, i.e

1/4 inches (model) --> equivalent to 167 feet (actual)   (multiply both sides by 4)

1 inch (model) --> equivalent to 167 x 4 = 668 feet (actual)

2.5 inch (model)--> equivalent to 668 x 2.5 = 1,670 feet

3 0
3 years ago
And this one too please and thank u.
inn [45]

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( - 4 \\  - 3

Step-by-step explanation:

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8 0
3 years ago
You have to spend money to make money ! You purchase a mix of newspaper ads and online ads. Each newspaper ad cost $18.50 and ea
SpyIntel [72]

Answer:

You buy six newspaper ads & eighteen social media ads.

Step-by-step explanation:

First, we change ads into variables to be more easier to calculate :

Let newspaper = x

Let social media = y

Second, make this variables into an equation, given that you purchase a total of 24 ads :

x + y = 24 (first equation)

Next, given that x = $18.50 & y = $26.50 & spent a total of $588 so you can make another equation :

18.50x + 26.50y = 588 (second equation)

Now, solve this simultaneous equation using elimination or substitution (depends on you) :

substitution =>

x + y = 24 ----------(1)

18.50x + 26.50y = 588 ---------(2)

(1)=> y = 24 - x ------(3)

(3)=>(2) 18.5x + 26.5(24-x) = 588

18.5x + 636 - 26.5x = 588

-8x = -48

x = 6

sub x=6 into(3)

(3)=> y = 24 - 6

= 18

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6 0
3 years ago
How come this person didn’t divide EVERYTHING on the left by 2? I thought you had to...
damaskus [11]

The short answer is that algebra doesn't work that way. You wouldn't divide *everything* by 2, but every term that contains a factor of 2.

In the expression

2 (6<em>x</em> - 1) + 2 (2<em>x</em> + 5)

both terms have a factor of 2 (the 2 out in front of them). They're the ones that get canceled when dividing by 2:

(2 (6<em>x</em> - 1) + 2 (2<em>x</em> + 5)) / 2 = 2/2 (6<em>x</em> - 1) + 2/2 (2<em>x</em> - 5)

… = 1 (6<em>x</em> - 1) + 1 (2<em>x</em> - 5)

… = (6<em>x</em> - 1) + (2<em>x</em> - 5)

and so on.

Looking ahead, it turns out that the equation is solved by <em>x</em> = 7. This makes 6<em>x</em> - 1 = 41 and 2<em>x</em> + 5 = 19. So the equation is saying that, if you make these replacements,

2×41 + 2×19 = 120

If you divide *everything* on the left by 2, you end up with fractions:

(2/2)×(41/2) + (2/2)×(19/2) = 41/2 + 19/2

but 41 + 19 = 60, so the end result would be 30, but that's not the same as 120/2 = 60.

5 0
3 years ago
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