D they need to equal 77 (x+5) is for the additional 5 to only one x x + (x+5) is because you don’t need to multiply the two x because that answer would end up much higher ex: 5+5=10 but 5(5)=25
if you need to solve, x+(x+5)=77 -5 2x=72 (you’re left with 2 of the same x so they can be combined to just have 2x) divide by 2 x=36
