Answer:
5.6
Step-by-step explanation:
6.4x + 3y = 36
x = 3
6.4(3) + 3y = 36
6.4 * 3 = 19.2
19.2 + 3y = 36
36 - 19.2 = 16.8
19.2 - 19.2 = 0
3y = 16.8
16.8/3 = 5.6
3y/3 = y
y = 5.6
B. 5.6
