x+15+x-12=45

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Solution for x+15+x-12=45 equation:


Simplifying
x + 15 + x + -12 = 45

Reorder the terms:
15 + -12 + x + x = 45

Combine like terms: 15 + -12 = 3
3 + x + x = 45

Combine like terms: x + x = 2x
3 + 2x = 45

Solving
3 + 2x = 45

Solving for variable 'x'.

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

Add '-3' to each side of the equation.
3 + -3 + 2x = 45 + -3

Combine like terms: 3 + -3 = 0
0 + 2x = 45 + -3
2x = 45 + -3

Combine like terms: 45 + -3 = 42
2x = 42

Divide each side by '2'.
x = 21

Simplifying
x = 21

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