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Simplifying
19 = x2 + -30
Reorder the terms:
19 = -30 + x2
Solving
19 = -30 + x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-1x2' to each side of the equation.
19 + -1x2 = -30 + x2 + -1x2
Combine like terms: x2 + -1x2 = 0
19 + -1x2 = -30 + 0
19 + -1x2 = -30
Add '-19' to each side of the equation.
19 + -19 + -1x2 = -30 + -19
Combine like terms: 19 + -19 = 0
0 + -1x2 = -30 + -19
-1x2 = -30 + -19
Combine like terms: -30 + -19 = -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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