Question 1 Answer & Explanation - SAT Algebra

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algebra

Solve for $x$ : $3x + 10 = x + 20$

2.5

Correct Answer: B

Choice Ahoice C is the correct answer.

Subtract x: $2x + 10 = 20$
Subtract 10: $2x = 10$
Divide by 2: $x = 5$
Verify: $3(5) + 10 = 25$ and $5 + 20 = 25$ ✓

Choice Ahoice B is incorrect because calculation error.

Choice Ahoice C is incorrect because calculation error.

Choice Ahoice D is incorrect because calculation error.

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Linear Functions Set 17

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