Question

Tina wrote the equations 3x-y=9 and 4x+y=5. What can Tina conclude about the solution to this system of equations?

a)-3,2
b)-2,3
c)2,-3
d)3,-2

Answer 1

ANSWER IS C
3x-y=9 eq 1
4x+y=5 eq2
y=5-4x eq3 from eq 2
substitute value of y in equation 1
3x-5+4x=9
x=2
put value of x in eq number 3
y= 5-4(2)
y=5-8
y=-3
SO ANSWER IS C THAT IS 2,-3
x=2 y= -3

Answer 2

The answer to your question is: C. 2,-3
Hope this helps