12-7x=132-42x+20

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Solution for 12-7x=132-42x+20 equation:


Simplifying
12 + -7x = 132 + -42x + 20

Reorder the terms:
12 + -7x = 132 + 20 + -42x

Combine like terms: 132 + 20 = 152
12 + -7x = 152 + -42x

Solving
12 + -7x = 152 + -42x

Solving for variable 'x'.

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

Add '42x' to each side of the equation.
12 + -7x + 42x = 152 + -42x + 42x

Combine like terms: -7x + 42x = 35x
12 + 35x = 152 + -42x + 42x

Combine like terms: -42x + 42x = 0
12 + 35x = 152 + 0
12 + 35x = 152

Add '-12' to each side of the equation.
12 + -12 + 35x = 152 + -12

Combine like terms: 12 + -12 = 0
0 + 35x = 152 + -12
35x = 152 + -12

Combine like terms: 152 + -12 = 140
35x = 140

Divide each side by '35'.
x = 4

Simplifying
x = 4

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