3+12-x=30

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Solution for 3+12-x=30 equation:


Simplifying
3 + 12 + -1x = 30

Combine like terms: 3 + 12 = 15
15 + -1x = 30

Solving
15 + -1x = 30

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 + -1x = 30 + -15

Combine like terms: 15 + -15 = 0
0 + -1x = 30 + -15
-1x = 30 + -15

Combine like terms: 30 + -15 = 15
-1x = 15

Divide each side by '-1'.
x = -15

Simplifying
x = -15

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