The equation is adjusted by dividing the tax amount by the percent to find the original cost. Dividing by the percent is the inverse operation of multiplying by percent.
If this question is from edge 2021 it's 100% right.
Well just substitute y (the first equation) into the second equation. So 5x-4(5-3x)=-3 Then just solve the equation from there. 5x-20+12x=-3 17x=17 x=1 and if you need y, y=2
