Solve for x: 3x + 7 = 22

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Study for the 8th Grade FAST Mathematics Pre-Algebra Test. Enhance your skills with interactive flashcards and multiple choice questions, each containing hints and explanations to boost your comprehension and readiness for the exam. Get ready to ace your test!

Multiple Choice

Solve for x: 3x + 7 = 22

Explanation:
To solve for x, undo what’s been done to x. In 3x + 7 = 22, x is multiplied by 3 and then 7 is added. Subtract 7 from both sides to isolate the term with x: 3x = 15. Then divide both sides by 3 to undo the multiplication: x = 5. Check: substitute back, 3(5) + 7 = 15 + 7 = 22, which matches the right side. So x = 5.

To solve for x, undo what’s been done to x. In 3x + 7 = 22, x is multiplied by 3 and then 7 is added. Subtract 7 from both sides to isolate the term with x: 3x = 15. Then divide both sides by 3 to undo the multiplication: x = 5.

Check: substitute back, 3(5) + 7 = 15 + 7 = 22, which matches the right side. So x = 5.

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