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1

Set 4: Systems Of Equations (Beginner)

Explanation

Answer: D

PROBLEM

Solve: 3x + 4y = 47, 4x + y = 28. Find x.

Solve: 3x + 4y = 47, 4x + y = 28. Find x.

A.

6

B.

3

C.

7

D.

5

✓ Correct

Detailed Explanation

Choice D is the best answer. Using elimination or substitution: x = 5

Why others are wrong:
A: 6 is incorrect because it does not satisfy the equation.
B: 3 is incorrect because it does not satisfy the equation.
C: 7 is incorrect because it does not satisfy the equation.
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