D -3m-4n+14. Once you write out the equation, you have to combine all the like terms, also known as simplifiying
Hey~
Possibly C.
It makes the most sense.
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Probably the subsitution method
y=1/2x
subsitute that fr y
2x+3(1/2x)=28
2x+3/2x=28
times 2 both sides
4x+3x=56
7x=56
divide by 7 both sides
x=8
sub back
y=1/2x
y=1/2(8)
y=4
(x,y)
(8,4)
Answer:3/2
how i did this
Add 11 to both sides.
4x=5+1
Simplify 5+15+1 to 66.
4x=6
Divide both sides by 4
x= 6/4
Simplify 6/4 to 3/2
Awnser
x=3/2
Sorry if not helpful just trying my best :)
