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Simplifying
-1x2 + 7 = -42
Reorder the terms:
7 + -1x2 = -42
Solving
7 + -1x2 = -42
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-7' to each side of the equation.
7 + -7 + -1x2 = -42 + -7
Combine like terms: 7 + -7 = 0
0 + -1x2 = -42 + -7
-1x2 = -42 + -7
Combine like terms: -42 + -7 = -49
-1x2 = -49
Divide each side by '-1'.
x2 = 49
Simplifying
x2 = 49
Take the square root of each side:
x = {-7, 7}
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