Question

0.7x*4=0.8x-7

Answer 1

If you are expected to solve for x, first multiply 0.7x * 4.

2.8x = 0.8x - 7

Subtract 0.8x from both sides of the equation to get x on one side. Whatever operation you do to one side of an equation you must do to the other side as well.

2.8x - 0.8x = 0.8x - 0.8x - 7

2x = -7

Now divide both sides by 2 to get x by itself.

2x/2 = -7/2

x = -7/2 = -3.5 (decimal form)

You can check this answer with the original equation. It always helps to check your work!