15-(-b)=30

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Solution for 15-(-b)=30 equation:


Simplifying
15 + -1(-1b) = 30

Remove parenthesis around (-1b)
15 + -1 * -1b = 30

Multiply -1 * -1
15 + 1b = 30

Solving
15 + 1b = 30

Solving for variable 'b'.

Move all terms containing b to the left, all other terms to the right.

Add '-15' to each side of the equation.
15 + -15 + 1b = 30 + -15

Combine like terms: 15 + -15 = 0
0 + 1b = 30 + -15
1b = 30 + -15

Combine like terms: 30 + -15 = 15
1b = 15

Divide each side by '1'.
b = 15

Simplifying
b = 15

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