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Simplifying
5x2 + 21 = 70
Reorder the terms:
21 + 5x2 = 70
Solving
21 + 5x2 = 70
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 + 5x2 = 70 + -21
Combine like terms: 21 + -21 = 0
0 + 5x2 = 70 + -21
5x2 = 70 + -21
Combine like terms: 70 + -21 = 49
5x2 = 49
Divide each side by '5'.
x2 = 9.8
Simplifying
x2 = 9.8
Take the square root of each side:
x = {-3.130495169, 3.130495169}
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