Solve for x
x\leq 75
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x\leq 300-3x
Use the distributive property to multiply 3 by 100-x.
x+3x\leq 300
Add 3x to both sides.
4x\leq 300
Combine x and 3x to get 4x.
x\leq \frac{300}{4}
Divide both sides by 4. Since 4 is positive, the inequality direction remains the same.
x\leq 75
Divide 300 by 4 to get 75.
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