12+X=-7+20

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Solution for 12+X=-7+20 equation: 


Simplifying
12 + X = -7 + 20

Combine like terms: -7 + 20 = 13
12 + X = 13

Solving
12 + X = 13

Solving for variable 'X'.

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

Add '-12' to each side of the equation.
12 + -12 + X = 13 + -12

Combine like terms: 12 + -12 = 0
0 + X = 13 + -12
X = 13 + -12

Combine like terms: 13 + -12 = 1
X = 1

Simplifying
X = 1

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