1/2r + 4= 3/4r - 3/2
1/2r + 4= 3/4r - 3/21/2 = 2/43/2 = 6/4re-write2/4r + 4 = 3/4r - 3/42/4r - 3/4r = -3/4 - 4-1/4r = -4 3/4 r = (-4 3/4) / (-1/4) r =(-4 3/4) * (-4) r = 76/4 r = 19
I hope this helps you