Question 6 Answer & Explanation - SAT Algebra

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algebra

If $7x - 4 = 2x + 21$ , what is the value of $x$ ?

3.4

Correct Answer: D

Choice Dhoice A is the correct answer.

Subtract 2x: $5x - 4 = 21$
Add 4: $5x = 25$
Divide by 5: $x = 5$
Verify: $35 - 4 = 31$ and $10 + 21 = 31$ ✓

Choice Dhoice C is incorrect because calculation error.

Choice Dhoice D is incorrect because calculation error.

Choice Dhoice C is incorrect because calculation error.

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Linear Functions Set 19

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