Question

have school in a little and forgot to do a few problems someone please help, emergency !

3x+y=14
x=y-3

Answer 1

substitute x=y-3 into the first equation to get

3(y-3)+y=14

and solve for y

Answer 2

the second equation will then give you x

Answer 3

substitution or elimination you can use either of the two

Answer 4

3(y-3)+y = 14
3y - 9 + y = 14
4y - 9 = 14
4y = 14+9
4y = 23
y = 23/4
= 5.75

Substituting y = 5.75 :
x= y - 3
x = (5.75) - 3
= 2.75