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Simplifying
10x2 + 30 = 120
Reorder the terms:
30 + 10x2 = 120
Solving
30 + 10x2 = 120
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-30' to each side of the equation.
30 + -30 + 10x2 = 120 + -30
Combine like terms: 30 + -30 = 0
0 + 10x2 = 120 + -30
10x2 = 120 + -30
Combine like terms: 120 + -30 = 90
10x2 = 90
Divide each side by '10'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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