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1. y = x + 3

2 x + 3 y = 4
2 x + 3 (x + 3) = 4
2 x + 3 x + 9 = 4
5x = 4-9
5x = -5
x = -5/5
x = -1
y = -1+3 =2

2. x = y - 10

x = 2y + 8
y-10 = 2y + 8
y-2y = 8+10
-y = 18
y = 18
x = 18-10 = 8

3. y = 2x

y = -x-3
2x = -x -3
2x+x = -3
3x = -3
x = -1
y= 2(-1)
y = -2

4. x-2y = 2
x = 2+2y

3y - 5x = -24
3y - 5(2+2y) = -24
3y -10 -10y = -24
-7y = 14
y = 2
x = 2+2(2) = 2+4 =6

5. x-y = 3
x = 3+y

2x+3y = 16
2(3+y) + 3y = 16
6+2y +3y = 16
5y = 10
y = 2
x = 3+2 = 5

6. 5x+y = 10
y = 10-5x

4x-2y = -6
4x - 2(10-5x) = -6
4x - 20 + 10x = -6
14x = 14
x = 1

1.
y = x + 3
2x + 3y = 4

2x + 3y = 4
2x + 3(x + 3) = 4
2x + 3x + 9 = 4
5x = 4 - 9
5x = - 5
x = - 1

y = x + 3
y = - 1 + 3
y = 2

2.
x = y - 10
x = 2y + 8

x = 2y + 8
x - 2y = 8
y - 10 - 2y = 8
- y = 8 + 10
- y = 18
y = - 18

x = y - 10
x = - 18 - 10
x = - 28

3.
y = 2x
y = - x - 3

y = - x - 3
y + x = - 3
2x + x = - 3
3x = - 3
x = - 1

y = 2x
y = - 2

4.
x - 2y = 2
3y - 5x = - 24

x - 2y = 2
x = 2 + 2y

3y - 5x = - 24
3y - 5(2 + 2y) = - 24
3y - 10 - 10y = - 24
- 7y = - 24 + 10
- 7y = - 14
y = 2

x = 2 + 2y
x = 2 + 4
x = 4

5.
x - y = 3
2x + 3 = 16

2x + 3 = 16
2x = 16 - 3
2x = 13
x = 6,5

x - y = 3
6,5 - y = 3
- y = 3 - 6,5
- y = - 3,5
y = 3,5

6.
5x + y = 10
4x - 2y = - 6

5x + y = 10
y = 10 - 5x

4x - 2y = - 6
4x - 2(10 - 5x) = - 6
4x - 20 + 10x = - 6
14x = - 6 + 20
14x = 14
x = 1

y = 10 - 5x
y = 10 - 5
y = 5

Maaf Kalau Salah