Question 581807
"the perimeter of a rectangle is 50m" ___ 2L + 2W = 50 (A)


"if the width were doubled and the length were increased by 25m, the perimeter would be 112m"
___ 2(L + 25) + 2(2W) = 112 ___ 2L + 50 + 4W = 112 (B)


subtracting equation A from equation B will eliminate L


find W, and then substitute back to find L