7

Set 3: Systems Of Equations (Intermediate)

Explanation

Answer: A

PROBLEM

Solve: 5x + 2y = 38, 5x + 5y = 50. Find x.

Solve: 5x + 2y = 38, 5x + 5y = 50. Find x.

A.

6

✓ Correct
B.

7

C.

4

D.

5

Detailed Explanation

Choice A is the best answer. Using elimination or substitution: x = 6

Why others are wrong:
B: 7 is incorrect because it does not satisfy the equation.
C: 4 is incorrect because it does not satisfy the equation.
D: 5 is incorrect because it does not satisfy the equation.