Answer:
see analysis
Step-by-step explanation:
1.15X+ 0.6 5Y = 8.90----------(1)
X - 3Y = -15------------------(2)
from equation (2)
X = -15 + 3Y -----------(3)
put equation (3) into one
1.15(-15+3Y)+ 0 .65Y =8.90
-17.25 + 3.45Y +0.65Y = 8.90
4.1 Y = 8.90+17.25
4.1 Y = 26.15
Y = 26.15/4.1
Y = 6.378
put Y= 6.378 into equation (2)
X - 3(6.378) = -15
X - 19.134 = -15
X= -15 + 19.134
X= 4.134
