Solve for B
B=\frac{435-A}{2}
Solve for A
A=435-2B
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2B=435-A
Subtract A from both sides.
\frac{2B}{2}=\frac{435-A}{2}
Divide both sides by 2.
B=\frac{435-A}{2}
Dividing by 2 undoes the multiplication by 2.
A=435-2B
Subtract 2B from both sides.
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