31-5b+9+12b-19=72

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Solution for 31-5b+9+12b-19=72 equation:


Simplifying
31 + -5b + 9 + 12b + -19 = 72

Reorder the terms:
31 + 9 + -19 + -5b + 12b = 72

Combine like terms: 31 + 9 = 40
40 + -19 + -5b + 12b = 72

Combine like terms: 40 + -19 = 21
21 + -5b + 12b = 72

Combine like terms: -5b + 12b = 7b
21 + 7b = 72

Solving
21 + 7b = 72

Solving for variable 'b'.

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

Add '-21' to each side of the equation.
21 + -21 + 7b = 72 + -21

Combine like terms: 21 + -21 = 0
0 + 7b = 72 + -21
7b = 72 + -21

Combine like terms: 72 + -21 = 51
7b = 51

Divide each side by '7'.
b = 7.285714286

Simplifying
b = 7.285714286

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