Solve for w
w=-22.5
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-12.9=w+9.6
Multiply both sides of the equation by 3.
w+9.6=-12.9
Swap sides so that all variable terms are on the left hand side.
w=-12.9-9.6
Subtract 9.6 from both sides.
w=-22.5
Subtract 9.6 from -12.9 to get -22.5.
Examples
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