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Which inequality is obtained by simplifying (2x+2y\leq 10)?

Answer and explanation

Correct answer: (x+y\leq 5)

The direct answer is option A, \(x+y\le5\). Start with \(2x+2y\le10\). Every term and both sides can be divided by the positive number 2, so the inequality sign does not change: \((2x+2y)/2\le10/2\), giving \(x+y\le5\). Option A is correct. Option B reverses the inequality without reason; division by a positive number never reverses it. Option C changes addition into subtraction, which is not a valid simplification. Option D leaves an incorrect coefficient on x and is not obtained by dividing every term by 2. If the divisor were negative, the sign would reverse, but 2 is positive. Memory cue: divide every term, and reverse an inequality only when multiplying or dividing by a negative number.

Related tags

Linear InequalitiesSimplificationGraphing

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