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Simplifying
5x2 + -21 = 24
Reorder the terms:
-21 + 5x2 = 24
Solving
-21 + 5x2 = 24
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 = 24 + 21
Combine like terms: -21 + 21 = 0
0 + 5x2 = 24 + 21
5x2 = 24 + 21
Combine like terms: 24 + 21 = 45
5x2 = 45
Divide each side by '5'.
x2 = 9
Simplifying
x2 = 9
Take the square root of each side:
x = {-3, 3}
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