20=4-.5Q

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Solution for 20=4-.5Q equation:


Simplifying
20 = 4 + -0.5Q

Solving
20 = 4 + -0.5Q

Solving for variable 'Q'.

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

Add '0.5Q' to each side of the equation.
20 + 0.5Q = 4 + -0.5Q + 0.5Q

Combine like terms: -0.5Q + 0.5Q = 0.0
20 + 0.5Q = 4 + 0.0
20 + 0.5Q = 4

Add '-20' to each side of the equation.
20 + -20 + 0.5Q = 4 + -20

Combine like terms: 20 + -20 = 0
0 + 0.5Q = 4 + -20
0.5Q = 4 + -20

Combine like terms: 4 + -20 = -16
0.5Q = -16

Divide each side by '0.5'.
Q = -32

Simplifying
Q = -32

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