1x+7=3x-20

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Solution for 1x+7=3x-20 equation:


Simplifying
1x + 7 = 3x + -20

Reorder the terms:
7 + 1x = 3x + -20

Reorder the terms:
7 + 1x = -20 + 3x

Solving
7 + 1x = -20 + 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.
7 + 1x + -3x = -20 + 3x + -3x

Combine like terms: 1x + -3x = -2x
7 + -2x = -20 + 3x + -3x

Combine like terms: 3x + -3x = 0
7 + -2x = -20 + 0
7 + -2x = -20

Add '-7' to each side of the equation.
7 + -7 + -2x = -20 + -7

Combine like terms: 7 + -7 = 0
0 + -2x = -20 + -7
-2x = -20 + -7

Combine like terms: -20 + -7 = -27
-2x = -27

Divide each side by '-2'.
x = 13.5

Simplifying
x = 13.5

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