Can someone help me with math

Here are the problems. I didn't go to school today and wasn't able to come in for help. Here are the problems. You'll get 10 points!

Solve each system by substitution:
1) 2x+y=1
-3+2y=9

2) 3x-3y=-9
4x+y=-12

3) x-2y=10
2x-y=11

4) x+3y=6
2x+4y=10

5)3x+y=8
-2x+3y=-9

6) x-3y=-9
2x-4y=-12

7) 3x+y=3
-3x+4y=-3

8) -x-3y=7
X-4y=0

9) 2x+y=2
4x+4y=-4

by substitution means u solve for one variable in either equation n replace it in the other equation. n then u plog the result in either equation to find the other variable.
like 9)
sove for y in 1st eq. y = 2-2x, then where ever u c y in the second equation u just replace it by 2-2x
so in the second equation we will have 4x + 4(2-2x) =4
4x + 8 - 8x = 4
-4x =4-8
x = 1
plug 1 in either equation to get y
so 2(1) - y = 2
y = 0

Stop being so lazy and skipping school and do these damn problems yourself.

Your doing your country a disservice by being so uneducated and lazy, GET WITH IT!

1)y=-2x+1
2y/2=3/2x+9/2
y=3/2x+9/2

2)-3y/-3=-3/-3x-9/-3
y=x+3
y=-4x-12

lol