-15=-6b+3b

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Solution for -15=-6b+3b equation:


Simplifying
-15 = -6b + 3b

Combine like terms: -6b + 3b = -3b
-15 = -3b

Solving
-15 = -3b

Solving for variable 'b'.

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

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

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

Add '15' to each side of the equation.
-15 + 15 + 3b = 0 + 15

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

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

Divide each side by '3'.
b = 5

Simplifying
b = 5

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