Answer:
Step-by-step explanation:
16x+8y=11
x+y=9
Make x subject of formula, then x=9-y
Substitute x into equation 1
16(9-y)+8y=11
144-16y+8y=11
-8y=11-144
-8y=-133
Then, y=-133/-8
y=16.625
Also x=9-y
Then, x=9-16.625
y=-7.625
Then, the solution (7,2) is not a solution to the simultaneous equation, it is only sufficient for equation 2, it doesn't satisfy equation 1
Them the solution to the simultaneous equation is (x, y)=(16.625,-7.625)
