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Simplifying
5b2 + -5 = 240
Reorder the terms:
-5 + 5b2 = 240
Solving
-5 + 5b2 = 240
Solving for variable 'b'.
Move all terms containing b to the left, all other terms to the right.
Add '5' to each side of the equation.
-5 + 5 + 5b2 = 240 + 5
Combine like terms: -5 + 5 = 0
0 + 5b2 = 240 + 5
5b2 = 240 + 5
Combine like terms: 240 + 5 = 245
5b2 = 245
Divide each side by '5'.
b2 = 49
Simplifying
b2 = 49
Take the square root of each side:
b = {-7, 7}
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