2(25-3b)-4b=90

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Solution for 2(25-3b)-4b=90 equation: 


Simplifying
2(25 + -3b) + -4b = 90
(25 * 2 + -3b * 2) + -4b = 90
(50 + -6b) + -4b = 90

Combine like terms: -6b + -4b = -10b
50 + -10b = 90

Solving
50 + -10b = 90

Solving for variable 'b'.

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

Add '-50' to each side of the equation.
50 + -50 + -10b = 90 + -50

Combine like terms: 50 + -50 = 0
0 + -10b = 90 + -50
-10b = 90 + -50

Combine like terms: 90 + -50 = 40
-10b = 40

Divide each side by '-10'.
b = -4

Simplifying
b = -4

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