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Simplifying
3x2 + -40 = 203
Reorder the terms:
-40 + 3x2 = 203
Solving
-40 + 3x2 = 203
Solving for variable 'x'.
Move all terms containing x to the left, all other terms to the right.
Add '40' to each side of the equation.
-40 + 40 + 3x2 = 203 + 40
Combine like terms: -40 + 40 = 0
0 + 3x2 = 203 + 40
3x2 = 203 + 40
Combine like terms: 203 + 40 = 243
3x2 = 243
Divide each side by '3'.
x2 = 81
Simplifying
x2 = 81
Take the square root of each side:
x = {-9, 9}
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