Solve for x: 9c-4x=7

## solving for x

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# 3 Answers

Hi Monet;

9c-4x=7

Let's begin with subtracting 9c from both sides...

-9c+9c-4x=7-9c

-4x=7-9c

Let's divide both sides by -4...

(-4x)(-4)=(7-9c)/-4

x=(7-9c)/-4

Let's multiply the right side by -1/-1

x=[(7-9c)/-4](-1/-1)

x=(9c-7)/4

9c - 4x = 7

9c - 4x -9c = 7 - 9c (subtract 9c from both sides to get the x term by itself on the left)

-4x = 7 - 9c (simplify, -9c eliminated from left side of equation)

-4x 7 - 9c

----- = -------- (divide both sides by -4 to get x by itself)

-4 -4

7 - 9c

x = --------- (simplify, equation is now solved for x)

-4

9c - 7

x = -------- (alternate form, multiplied top and bottom by -1 to eliminate negative sign on denominator)

4

There you go!

9c - 4x = 7

9c -4x +4x = 7 + 4x => 9c = 7 + 4x

9c -7 = 7 + 4x -7 => 9c - 7 = 4x

(1/4)(9c - 7) = (1/4)*4x => x = (9c-7)/4

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