Solve for A
A=120
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5A+6A=1320
Multiply both sides of the equation by 30, the least common multiple of 6,5.
11A=1320
Combine 5A and 6A to get 11A.
A=\frac{1320}{11}
Divide both sides by 11.
A=120
Divide 1320 by 11 to get 120.
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