0.6x - 0.3y = 2.4
if y = 2x + 1:
0.6x - 0.3(2x + 1) = 2.4
0.6x - 0.6x - 0.3 = 2.4
-0.3 = 2.4 False
if 3x + y = 2:
y = 2 - 3x
0.6x - 0.3(2 - 3x) = 2.4
0.6x - 0.6 + 0.9x = 2.4
1.5x = 3
x = 3/1.5 = 2
if 2y = 4 - 6x:
y = (4 - 6x)/2
0.6x - 0.3((4 - 6x)/2) = 2.4
0.6x - 0.3(0.5(4 - 6x)) = 2.4
0.6x - (0.6 - 0.9x) = 2.4
0.6x - 0.6 + 0.9x = 2.4
1.5x = 3.0
x = 3.0/1.5 = 2
if y = 3 - 2x:
0.6x - 0.3(3 - 2x) = 2.4
0.6x - 0.9 + 0.6x = 2.4
1.2x = 3.3
x = 3.3/1.2 = 2.75