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Simplifying
30x2 + -180 = 90
Reorder the terms:
-180 + 30x2 = 90
Solving
-180 + 30x2 = 90
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '180' to each side of the equation.
-180 + 180 + 30x2 = 90 + 180
Combine like terms: -180 + 180 = 0
0 + 30x2 = 90 + 180
30x2 = 90 + 180
Combine like terms: 90 + 180 = 270
30x2 = 270
Divide each side by '30'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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