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Simplifying
5(3 + x2) = 70
(3 * 5 + x2 * 5) = 70
(15 + 5x2) = 70
Solving
15 + 5x2 = 70
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-15' to each side of the equation.
15 + -15 + 5x2 = 70 + -15
Combine like terms: 15 + -15 = 0
0 + 5x2 = 70 + -15
5x2 = 70 + -15
Combine like terms: 70 + -15 = 55
5x2 = 55
Divide each side by '5'.
x2 = 11
Simplifying
x2 = 11
Take the square root of each side:
x = {-3.31662479, 3.31662479}
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