0.53x - 3.4 = 7.20.53x = 7.2 + 3.40.53x = 10.6x = 10.6 / 0.53x = 20
32.1a - 19.6a = 112.5a = 1a = 1 / 12.5a = 0.08
0.53x - 3.4 = 7.2
0.53x = 7.2 + 3.4
0.53x = 10.6
x = 10.6 / 0.53
x = 20
32.1a - 19.6a = 1
12.5a = 1
a = 1 / 12.5
a = 0.08