21b+-15b=-9+3

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Solution for 21b+-15b=-9+3 equation: 


Simplifying
21b + -15b = -9 + 3

Combine like terms: 21b + -15b = 6b
6b = -9 + 3

Combine like terms: -9 + 3 = -6
6b = -6

Solving
6b = -6

Solving for variable 'b'.

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

Divide each side by '6'.
b = -1

Simplifying
b = -1

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