90A-120(-1b)=100

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Solution for 90A-120(-1b)=100 equation: 


Simplifying
90A + -120(-1b) = 100

Remove parenthesis around (-1b)
90A + -120 * -1b = 100

Multiply -120 * -1
90A + 120b = 100

Solving
90A + 120b = 100

Solving for variable 'A'.

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

Add '-120b' to each side of the equation.
90A + 120b + -120b = 100 + -120b

Combine like terms: 120b + -120b = 0
90A + 0 = 100 + -120b
90A = 100 + -120b

Divide each side by '90'.
A = 1.111111111 + -1.333333333b

Simplifying
A = 1.111111111 + -1.333333333b

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