30=120-2Q

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Solution for 30=120-2Q equation:


Simplifying
30 = 120 + -2Q

Solving
30 = 120 + -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.
30 + 2Q = 120 + -2Q + 2Q

Combine like terms: -2Q + 2Q = 0
30 + 2Q = 120 + 0
30 + 2Q = 120

Add '-30' to each side of the equation.
30 + -30 + 2Q = 120 + -30

Combine like terms: 30 + -30 = 0
0 + 2Q = 120 + -30
2Q = 120 + -30

Combine like terms: 120 + -30 = 90
2Q = 90

Divide each side by '2'.
Q = 45

Simplifying
Q = 45

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