Advanced Math practice question

Answer: A. 6x + 4

Add the x terms together and the constants together: 4x + 2x = 6x and 7 + (−3) = 4. The sum is 6x + 4.

Why the other answers are wrong

B. 6x + 10

The constants were added as 7 + 3 instead of 7 + (−3). The second bracket subtracts 3.

C. 8x + 4

8x would need 4x + 4x. The second bracket has 2x, so the x terms add to 6x.

D. 6x − 4

7 − 3 is +4, not −4. The larger constant is positive.

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