3 years ago

7x-8 = 3x What does x equal?

2 answers:

8 0

$7x - 8 = 3x \\ \\ -8 = 3x - 7x \\ \\ -8 = -4x \\ \\ \frac{-8}{-4} = x \\ \\ \frac{8}{4} = x \\ \\ 2 = x \\ \\ x = 2 \\ \\ Answer: \fbox {x = 2}$

tiny-mole [99]3 years ago

6 0

7 x - 8 = 3x

add 8 to both sides:

7 x - 8 + 8 = 3 x + 8

7x = 3 x + 8

subtract 3x from both sides:

7 x - 3 x = 3 x + 8 - 3x

4x = 8

Divide both sides by 4 :

4x / 4 = 8 / 4

x = 2

hope this helps!.

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