Solve for a
a\leq \frac{4800}{71}
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70a\leq 4800-a
Multiply 80 and 60 to get 4800.
70a+a\leq 4800
Add a to both sides.
71a\leq 4800
Combine 70a and a to get 71a.
a\leq \frac{4800}{71}
Divide both sides by 71. Since 71 is positive, the inequality direction remains the same.
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