-3b+7=-15

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Solution for -3b+7=-15 equation: 


Simplifying
-3b + 7 = -15

Reorder the terms:
7 + -3b = -15

Solving
7 + -3b = -15

Solving for variable 'b'.

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

Add '-7' to each side of the equation.
7 + -7 + -3b = -15 + -7

Combine like terms: 7 + -7 = 0
0 + -3b = -15 + -7
-3b = -15 + -7

Combine like terms: -15 + -7 = -22
-3b = -22

Divide each side by '-3'.
b = 7.333333333

Simplifying
b = 7.333333333

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