You would subtract 3 from 0 and then the 3's would cancel out and it would be X=3
Answer:
B.
Step-by-step explanation:
its the same as saying..
4x - 3y = 9
x + 3y = 6
add both equation together
5x = 15
i.e X = 3
substitute x= 3 in equation 2
3 + 3y = 6
3y = 3
divide both sides by 3
y = 1
U/72 = 2/4
means u/72 = 0.5
therefore u = 72*0.5
which equals 36
Answer: A
Step-by-step explanation: i hope this helps