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SVETLANKA909090 [29]
3 years ago
9

Solve:- x + 67 = 83 Thanks!

Mathematics
2 answers:
Reil [10]3 years ago
6 0

°° Let's see -

First, you want to rewrite the equation:

x + 67 = 83

Let's do the 1 lonely step -

Subtract 67 from both sides of the = sign.

x + 67 - 67 = 83 - 67

Now, as you can see, our unknown 'x' equals 16

x = 16

______________________________________________________

Want to check your answer?

Just substitute the 16 for the x and then solve.

16 + 67 = 83

We were correct!

↑   ↑   ↑  Hope this helps! :D

(Note: When solving for variables like this, just use my method as a guide to help you get the answer to other problems! Example below)

Sample Example:

x + 48 = 92

Do our 1 lonely step: Subtract 48 from both sides.

x + 48 - 48 = 92 - 48.

x = 44

Check:

Switch the 'x' with the 44!

44 + 48 = 92!

TADA! We're done! Hope you enjoyed reading this!

torisob [31]3 years ago
4 0
Solve:-

x + 67 = 83
Inverse operation.
83 - 67 = x
83 - 67 = 16
x = 16

Check:-
x + 67 = 83
x = 16
16 + 67 = ?
16 + 67 = 83
Correct!

x = 16
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HELP
Nikitich [7]

Equations

Let the number of liters of 80% acid = x

Let the number of liters of 40% acid = y

x + y = 2

80%x + 40%y = 65% * 2

Step One

multiply the 2nd given by 100

(80/100)x + (40/100)y = (65/100)*2

80x + 40y = 2*65 = 130                 (3)

Step Two

Multiply the first given equation by 80

80x + 80y = 160                             (4)

Step Three

Subtract (4) - (3)

80x + 80y = 160

<u>80x + 40y = 130</u>

40y = 30               Divide by 40

y = 30/40

y = 3/4 = 0.75

What you have found is that out of 2 liters, 0.75 L must be the 40% acid.

Step Four

Find the 80% volume

x + y = 2

y = 0.75 L

x + 0.75 = 2

x = 2 - 0.75

x = 1.25 L

Answers

80% Volume = 1.25 L

40% Volume = 0.75 L



4 0
3 years ago
A tank has a capacity of 10 gallons. When it is full it contains 15% alcohol. How many gallons must be replaced by an 80% soluti
PIT_PIT [208]

Answer:

8.46 gallons needed to be replaced

Step-by-step explanation:

Let x be the alcohol amount that replaced

-Original has concentration of 15% multiply by the amount of 10 ,which is equal to (0.15×10).

-Removed has concentration of 15% multiply by the amount of x ,which is equal to (0.15 × X).

-Added has concentration of 80% multiply by the amount of X ,which is equal to (0.8× X).

-Solution has concentration of 70% multiply by the amount of 10 ,which is equal to (0.70×10).

So that, the equation will be:

Solution=Original + added - removed

7=1.5+0.8x-0.15x

7-1.5=0.65x

0.65x=55

x=55/0.65

x=8.46

8.46 gallons needed to be replaced.

5 0
3 years ago
HELP ASAP i dont know how to do any of this
nadya68 [22]

Answer:

Step-by-step explanation:

Circumference is= to diameter * Pi

6\pi = 6*3.14=18.84\\15\pi=15*3.14=47.1

For the ones that are radius, double it, then pi

21*2\pi = 42\pi =42*3.14=131.88\\6.7*2\pi=13.4\pi =13.4*3.14=47.076

6 0
3 years ago
How to write 3.05 in word form
Arturiano [62]
Three and five hundredths <span />
6 0
3 years ago
Grade 4
Lesechka [4]
The largest is 17.08
thank me later :)
6 0
3 years ago
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