3(20+B)=90

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Solution for 3(20+B)=90 equation: 


Simplifying
3(20 + B) = 90
(20 * 3 + B * 3) = 90
(60 + 3B) = 90

Solving
60 + 3B = 90

Solving for variable 'B'.

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

Add '-60' to each side of the equation.
60 + -60 + 3B = 90 + -60

Combine like terms: 60 + -60 = 0
0 + 3B = 90 + -60
3B = 90 + -60

Combine like terms: 90 + -60 = 30
3B = 30

Divide each side by '3'.
B = 10

Simplifying
B = 10

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