Choice C is the correct answer. Substitute the first equation into the second.
Step 1: Substitute y=5x−8 into 3x+2y=14:
3x+2(5x−8)=143x+10x−16=1413x=30x=1330
Non-integer. - First: 2=5(2)−8=10−8=2 ✓
- Second: 3(2)+2(2)=6+4=10 eq14
💡 Strategic Tip: When one equation is y = ..., substitution is natural.
Choice A is incorrect because3 eq5(3)−8=7.
Choice B is incorrect because−3=5(1)−8=−3 ✓, but 3(1)+2(−3)=−3 eq10.
Choice D is incorrect because12=5(4)−8=12 ✓, but 3(4)+2(12)=36 eq10.