3+(-x)=18

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Solution for 3+(-x)=18 equation: 


Simplifying
3 + (-1x) = 18

Solving
3 + (-1x) = 18

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 + (-1x) = 18 + -3

Combine like terms: 3 + -3 = 0
0 + (-1x) = 18 + -3
(-1x) = 18 + -3

Combine like terms: 18 + -3 = 15
(-1x) = 15

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

Simplifying
x = -15

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