Answer:
(X,Y)(18,12)
Step-by-step explanation:
x + y = 30
2x + 4y = 84
___________
2x+2y=60
2x+4y=84
_________
-2y=-24/-2y
y=12
2x+4(12)=84
2x+48=84
2x=84-48
2x/2=36/2
X=18
Answer:
3(t-y)
Step-by-step explanation:
difference means subtractions
3*(t-y)
Note that since 360 is a multiple of 120, 360 is the LCM of 120 and 360 - it's 360*1 and 120*3.
You answer is going to be: 540