Solve for β
\beta =\frac{2-\alpha }{3}
Solve for α
\alpha =2-3\beta
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3\beta =2-\alpha
Subtract \alpha from both sides.
\frac{3\beta }{3}=\frac{2-\alpha }{3}
Divide both sides by 3.
\beta =\frac{2-\alpha }{3}
Dividing by 3 undoes the multiplication by 3.
\alpha =2-3\beta
Subtract 3\beta from both sides.
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