Question

Can someone check my answers for solving systems using substitution?

Answer 1

Ok! :) where are the questions?

Answer 2

1. x+y=8
y=3x
my answer- (2,6)

2. 2x +2y=38
y=x+3
my answer- (8,11)

3. y= 8-x
7=2-y
my answer- (?)

4. 3x +2y=23
1/2x -4 =y
my answer- (?)

5. y-2x =3
3x -2y =5
my answer- (2,7)

6. 4x=3y-2
18=3x+y
my answer- (4,6)

Answer 3

you can use https://www.desmos.com/calculator

just type the two in, and click on the intersection point if there is one

Answer 4

or you can also check the answer by pluggin the values into both equations and see if they are both true

Answer 5

okay thank you

I got number 5 wrong, and im not sure the answers for 3 and 4, could you help ?

Answer 6

what is the second equation in 3? is that just with only y, 7 = 2 - y

Answer 7

number 3 is
y= 8-x
7=2-y

Answer 8

I actually figured out the answer for the rest of them, thank you for the help

Answer 9

that 3, looks like y=-5, and so x=13, k goodluck