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Simplifying
7 = 9x2 + -5
Reorder the terms:
7 = -5 + 9x2
Solving
7 = -5 + 9x2
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-9x2' to each side of the equation.
7 + -9x2 = -5 + 9x2 + -9x2
Combine like terms: 9x2 + -9x2 = 0
7 + -9x2 = -5 + 0
7 + -9x2 = -5
Add '-7' to each side of the equation.
7 + -7 + -9x2 = -5 + -7
Combine like terms: 7 + -7 = 0
0 + -9x2 = -5 + -7
-9x2 = -5 + -7
Combine like terms: -5 + -7 = -12
-9x2 = -12
Divide each side by '-9'.
x2 = 1.333333333
Simplifying
x2 = 1.333333333
Take the square root of each side:
x = {-1.154700538, 1.154700538}
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