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Simplifying
3x2 + 2 = 40
Reorder the terms:
2 + 3x2 = 40
Solving
2 + 3x2 = 40
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '-2' to each side of the equation.
2 + -2 + 3x2 = 40 + -2
Combine like terms: 2 + -2 = 0
0 + 3x2 = 40 + -2
3x2 = 40 + -2
Combine like terms: 40 + -2 = 38
3x2 = 38
Divide each side by '3'.
x2 = 12.66666667
Simplifying
x2 = 12.66666667
Take the square root of each side:
x = {-3.559026084, 3.559026084}
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