4(1b-3)=72

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Solution for 4(1b-3)=72 equation: 


Simplifying
4(1b + -3) = 72

Reorder the terms:
4(-3 + 1b) = 72
(-3 * 4 + 1b * 4) = 72
(-12 + 4b) = 72

Solving
-12 + 4b = 72

Solving for variable 'b'.

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

Add '12' to each side of the equation.
-12 + 12 + 4b = 72 + 12

Combine like terms: -12 + 12 = 0
0 + 4b = 72 + 12
4b = 72 + 12

Combine like terms: 72 + 12 = 84
4b = 84

Divide each side by '4'.
b = 21

Simplifying
b = 21

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