Solve for z
z\leq 40
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70z+4000-50z\leq 4800
Use the distributive property to multiply 80-z by 50.
20z+4000\leq 4800
Combine 70z and -50z to get 20z.
20z\leq 4800-4000
Subtract 4000 from both sides.
20z\leq 800
Subtract 4000 from 4800 to get 800.
z\leq \frac{800}{20}
Divide both sides by 20. Since 20 is positive, the inequality direction remains the same.
z\leq 40
Divide 800 by 20 to get 40.
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