Question 4 Answer & Explanation - SAT Algebra

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algebra

Two angles are supplementary (sum to 180). One angle is $4x$ and the other is $x + 30$ . What is $x$ ?

Correct Answer: C

Choice Dhoice D is the correct answer.

Equation: $4x + (x + 30) = 180$
Combine: $5x + 30 = 180$
Subtract 30: $5x = 150$
Divide by 5: $x = 30$
Verify: $120 + 60 = 180$ ✓

Choice Dhoice B is incorrect because calculation error.

Choice Dhoice C is incorrect because calculation error.

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