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Which is the solution of (8\leq 2x+4)?

Answer and explanation

Correct answer: (x\geq 2)

To solve this linear inequality, first isolate the term containing x and then divide by its positive coefficient. Adding or subtracting the same number on both sides preserves the inequality direction. Dividing by a positive number also preserves it; only division by a negative number would reverse the sign.

From \(8\le2x+4\), subtract 4 from both sides to obtain \(4\le2x\). Divide both sides by 2, which is positive, and get \(2\le x\). Writing the variable first gives \(x\ge2\). Hence option A is correct. The equality is included because the original inequality uses \(\le\), not a strict inequality.

Related tags

Linear InequalitiesIntroductionClass 11

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