1+2=x-7

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Solution for 1+2=x-7 equation:


Simplifying
1 + 2 = x + -7

Combine like terms: 1 + 2 = 3
3 = x + -7

Reorder the terms:
3 = -7 + x

Solving
3 = -7 + x

Solving for variable 'x'.

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

Add '-1x' to each side of the equation.
3 + -1x = -7 + x + -1x

Combine like terms: x + -1x = 0
3 + -1x = -7 + 0
3 + -1x = -7

Add '-3' to each side of the equation.
3 + -3 + -1x = -7 + -3

Combine like terms: 3 + -3 = 0
0 + -1x = -7 + -3
-1x = -7 + -3

Combine like terms: -7 + -3 = -10
-1x = -10

Divide each side by '-1'.
x = 10

Simplifying
x = 10

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