7x-30=3x-90

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Solution for 7x-30=3x-90 equation:


Simplifying
7x + -30 = 3x + -90

Reorder the terms:
-30 + 7x = 3x + -90

Reorder the terms:
-30 + 7x = -90 + 3x

Solving
-30 + 7x = -90 + 3x

Solving for variable 'x'.

Move all terms containing x to the left, all other terms to the right.

Add '-3x' to each side of the equation.
-30 + 7x + -3x = -90 + 3x + -3x

Combine like terms: 7x + -3x = 4x
-30 + 4x = -90 + 3x + -3x

Combine like terms: 3x + -3x = 0
-30 + 4x = -90 + 0
-30 + 4x = -90

Add '30' to each side of the equation.
-30 + 30 + 4x = -90 + 30

Combine like terms: -30 + 30 = 0
0 + 4x = -90 + 30
4x = -90 + 30

Combine like terms: -90 + 30 = -60
4x = -60

Divide each side by '4'.
x = -15

Simplifying
x = -15

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