solving for x

Question

Solve for x: 9c-4x=7 

Answer 1

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!

 

Answer 2

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

Answer 3

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