3+-7=x

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Solution for 3+-7=x equation:


Simplifying
3 + -7 = x

Combine like terms: 3 + -7 = -4
-4 = x

Solving
-4 = 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.
-4 + -1x = x + -1x

Combine like terms: x + -1x = 0
-4 + -1x = 0

Add '4' to each side of the equation.
-4 + 4 + -1x = 0 + 4

Combine like terms: -4 + 4 = 0
0 + -1x = 0 + 4
-1x = 0 + 4

Combine like terms: 0 + 4 = 4
-1x = 4

Divide each side by '-1'.
x = -4

Simplifying
x = -4

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