Question

Solve the system of equations by the substitution method.



Choose one answer.
a. (7, 2)
b. (-8, 2)
c. (-7, 1)
d. no solution

Answer 1

???????

Answer 2

Sorry! here it is!

Answer 3

isolate x in the x+4y=-11 equation
x=-11-4y now substitute this for x in the other equation
9(-11-4y)+3y=-66
-99-36y+3y=-66
-33y=-66+99
-33y=33
y=-1
x-4=-11
x=-7

Answer 4

Now we need to verify as we have another answer.
-7+4(-1)=-11
-11=-11 that one is o.k.
9(-7)+3(-1)=-66
-63-3=-66
-66=-66 It is a good bingo

Answer 5

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