1.5(b+2)+15+b+2b-9=90

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Solution for 1.5(b+2)+15+b+2b-9=90 equation: 


Simplifying
1.5(b + 2) + 15 + b + 2b + -9 = 90

Reorder the terms:
1.5(2 + b) + 15 + b + 2b + -9 = 90
(2 * 1.5 + b * 1.5) + 15 + b + 2b + -9 = 90
(3 + 1.5b) + 15 + b + 2b + -9 = 90

Reorder the terms:
3 + 15 + -9 + 1.5b + b + 2b = 90

Combine like terms: 3 + 15 = 18
18 + -9 + 1.5b + b + 2b = 90

Combine like terms: 18 + -9 = 9
9 + 1.5b + b + 2b = 90

Combine like terms: 1.5b + b = 2.5b
9 + 2.5b + 2b = 90

Combine like terms: 2.5b + 2b = 4.5b
9 + 4.5b = 90

Solving
9 + 4.5b = 90

Solving for variable 'b'.

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

Add '-9' to each side of the equation.
9 + -9 + 4.5b = 90 + -9

Combine like terms: 9 + -9 = 0
0 + 4.5b = 90 + -9
4.5b = 90 + -9

Combine like terms: 90 + -9 = 81
4.5b = 81

Divide each side by '4.5'.
b = 18

Simplifying
b = 18

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