90=3b-9+1.5b+3+15

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Solution for 90=3b-9+1.5b+3+15 equation: 


Simplifying
90 = 3b + -9 + 1.5b + 3 + 15

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

Combine like terms: -9 + 3 = -6
90 = -6 + 15 + 3b + 1.5b

Combine like terms: -6 + 15 = 9
90 = 9 + 3b + 1.5b

Combine like terms: 3b + 1.5b = 4.5b
90 = 9 + 4.5b

Solving
90 = 9 + 4.5b

Solving for variable 'b'.

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

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

Combine like terms: 4.5b + -4.5b = 0.0
90 + -4.5b = 9 + 0.0
90 + -4.5b = 9

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

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

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

Divide each side by '-4.5'.
b = 18

Simplifying
b = 18

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