Answer: so no matter what substitution you put in for the variable s you will always get equivalent for 5s...
Explanation:
when s=1 2(1)+3(1)=5(1) =2+3=5= equivalent
when s=2 2(2)+3(2)= 5(2)= 4+6=10 = equivalent
when s=3 2(3) +3(3) = 5(3) = 6+9=15 = equivalent
when s=4 2(4) + 3(4) = 5(4) = 8+12=20= equivalent
when s=20 2(20)+3(20)=5(20)=40+60=100= equivalent