Answer:
(5,20)
Step-by-step explanation:
Because 3x+2(4x)=55 is then 11x=55, then divide the both by 11 to get x=5
The substitute y=4(5) because of x the get y=20
a= 2s +3t
b= -m+4
c= a+2b+c
d= 2x-1
e= x squared + 3x +6
f= 4t-2st-s