12x+15-7x=20

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Solution for 12x+15-7x=20 equation:


Simplifying
12x + 15 + -7x = 20

Reorder the terms:
15 + 12x + -7x = 20

Combine like terms: 12x + -7x = 5x
15 + 5x = 20

Solving
15 + 5x = 20

Solving for variable 'x'.

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

Add '-15' to each side of the equation.
15 + -15 + 5x = 20 + -15

Combine like terms: 15 + -15 = 0
0 + 5x = 20 + -15
5x = 20 + -15

Combine like terms: 20 + -15 = 5
5x = 5

Divide each side by '5'.
x = 1

Simplifying
x = 1

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