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Simplifying
15 = 20 + -13x2
Solving
15 = 20 + -13x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '13x2' to each side of the equation.
15 + 13x2 = 20 + -13x2 + 13x2
Combine like terms: -13x2 + 13x2 = 0
15 + 13x2 = 20 + 0
15 + 13x2 = 20
Add '-15' to each side of the equation.
15 + -15 + 13x2 = 20 + -15
Combine like terms: 15 + -15 = 0
0 + 13x2 = 20 + -15
13x2 = 20 + -15
Combine like terms: 20 + -15 = 5
13x2 = 5
Divide each side by '13'.
x2 = 0.3846153846
Simplifying
x2 = 0.3846153846
Take the square root of each side:
x = {-0.620173673, 0.620173673}
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