9=90-2q

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Solution for 9=90-2q equation:


Simplifying
9 = 90 + -2q

Solving
9 = 90 + -2q

Solving for variable 'q'.

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

Add '2q' to each side of the equation.
9 + 2q = 90 + -2q + 2q

Combine like terms: -2q + 2q = 0
9 + 2q = 90 + 0
9 + 2q = 90

Add '-9' to each side of the equation.
9 + -9 + 2q = 90 + -9

Combine like terms: 9 + -9 = 0
0 + 2q = 90 + -9
2q = 90 + -9

Combine like terms: 90 + -9 = 81
2q = 81

Divide each side by '2'.
q = 40.5

Simplifying
q = 40.5

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