21+4b+(-17)+(-12)=

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Solution for 21+4b+(-17)+(-12)= equation: 


Simplifying
21 + 4b + (-17) + (-12) = 0
21 + 4b + -17 + (-12) = 0
21 + 4b + -17 + -12 = 0

Reorder the terms:
21 + -17 + -12 + 4b = 0

Combine like terms: 21 + -17 = 4
4 + -12 + 4b = 0

Combine like terms: 4 + -12 = -8
-8 + 4b = 0

Solving
-8 + 4b = 0

Solving for variable 'b'.

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

Add '8' to each side of the equation.
-8 + 8 + 4b = 0 + 8

Combine like terms: -8 + 8 = 0
0 + 4b = 0 + 8
4b = 0 + 8

Combine like terms: 0 + 8 = 8
4b = 8

Divide each side by '4'.
b = 2

Simplifying
b = 2

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