Choice C is the correct answer. Since $y = 4x - 3$ is already isolated, substitute directly.

Step 1: Substitute into second equation: $5x + 2(4x - 3) = 37$$5x + 8x - 6 = 37$$13x = 43$$x = \frac{43}{13}$

Non-integer. - First: $9 = 4(3) - 3 = 12 - 3 = 9$ ✓

• Second: $5(3) + 2(9) = 15 + 18 = 33 \ eq 37$

💡 Strategic Tip: When one equation is y = ..., substitution is natural.

Choice A is incorrect because$5(4) + 2(13) = 46 \ eq 33$.

Choice B is incorrect because$5(5) + 2(17) = 59 \ eq 33$.

Choice D is incorrect because$5(6) + 2(21) = 72 \ eq 33$.