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Simplifying
7x2 + -21 = 170
Reorder the terms:
-21 + 7x2 = 170
Solving
-21 + 7x2 = 170
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '21' to each side of the equation.
-21 + 21 + 7x2 = 170 + 21
Combine like terms: -21 + 21 = 0
0 + 7x2 = 170 + 21
7x2 = 170 + 21
Combine like terms: 170 + 21 = 191
7x2 = 191
Divide each side by '7'.
x2 = 27.28571429
Simplifying
x2 = 27.28571429
Take the square root of each side:
x = {-5.223572943, 5.223572943}
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