7(3b-3)=8b+31

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Solution for 7(3b-3)=8b+31 equation:


Simplifying
7(3b + -3) = 8b + 31

Reorder the terms:
7(-3 + 3b) = 8b + 31
(-3 * 7 + 3b * 7) = 8b + 31
(-21 + 21b) = 8b + 31

Reorder the terms:
-21 + 21b = 31 + 8b

Solving
-21 + 21b = 31 + 8b

Solving for variable 'b'.

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

Add '-8b' to each side of the equation.
-21 + 21b + -8b = 31 + 8b + -8b

Combine like terms: 21b + -8b = 13b
-21 + 13b = 31 + 8b + -8b

Combine like terms: 8b + -8b = 0
-21 + 13b = 31 + 0
-21 + 13b = 31

Add '21' to each side of the equation.
-21 + 21 + 13b = 31 + 21

Combine like terms: -21 + 21 = 0
0 + 13b = 31 + 21
13b = 31 + 21

Combine like terms: 31 + 21 = 52
13b = 52

Divide each side by '13'.
b = 4

Simplifying
b = 4

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