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Bezzdna [24]
4 years ago
11

Solve the equation 3x-4y=16 for x

Mathematics
2 answers:
dolphi86 [110]4 years ago
5 0

Hi there!


One little tip of advice I would like to give you is that when solving equations with 2 variables, and you're looking for only one, the second will always end up in your answer. So, since we're solving for x, the y will end up in our equation. :D


Let's begin!


3x - 4y = 16


Step 1) Add 4y to both sides.


3x - 4y + 4y = 16 + 4y 3x = 4y + 16


Step 2) Divide both sides by 3.


\frac{3x}{3} =  \frac{4y + 16}{3}


x =  \frac{4}{3} y +  \frac{16}{3}


Final answer -


x =  \frac{4}{3} y +  \frac{16}{3}


If you wanted to see this graphed, however, see the attached file. :)


Hope this helps!

Message me if you need anything else! I'd be happy to help! :D

Alex Ar [27]4 years ago
4 0
3x-4y=16
add 4y to both sides
3x=4y+16
divide both sides by 3
x=(4y+16)/3
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Answer:

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If the number is 4 or less, we keep the number as it is in the tenths place, and leave the numbers to the right 0's

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Answer:

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Step-by-step explanation:

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3 years ago
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Alja [10]
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7 0
3 years ago
Read 2 more answers
Y = 4x-9<br> y = x-3<br> Which method and why? Solve, shoving all work
vodomira [7]

Answer:

(2,-1)

Step-by-step explanation:

The ys in both questions are isolated on one side of the equation in both. The numerical coefficient of both is 1. Therefore you should equate the the left side of each equation to the other left side. The solution is the easiest one to solve because there is only 1 unknown on both sides.

4x - 9 = x - 3                      Subtract x from both sides.

4x-x - 9 = -3                       Combine

3x -9 = - 3                          Add 9 to both sides

3x - 9+9 = - 3+9

3x = 6                                Divide by 3

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x = 2

===============

Now use the second equation to solve for y

y = x - 3

y = 2 - 3

y = -1

==============

The solution is (2,-1)

7 0
3 years ago
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