tolonggg shh kak soal mtk yg bisa aja

2) a) 2x + 7 = 15
2x = 15 - 7
2x = 8
x = 4

b) 3x - 4 = 16
3x = 16 + 4
3x = 20
x = 20/3

c) 4y + 5 = y + 14
4y - y = 14 - 5
3y = 9
y = 3

d) 5y - 6 = 3y - 12
5y - 3y = - 12 + 6
2y = - 6
y = - 3

3a) y = x + 4
x = 0 => y = 0 + 4 => y = 4
y = 0 => 0 = x + 4 => x = - 4

b) y = 2x - 6
x = 0 => y = 2(0) - 6 => y = - 6
y = 0 => 0 = 2x - 6 => 2x = 6 => x = 3

c) x + 2y = 8
x = 0 => 2y = 8 => y = 4
y = 0 => x + 2(0) = 8 => x = 8

d) 3x + y = 6
x = 0 => 3(0) + y = 6 => y = 6
y = 0 => 3x + 0 = 6 => 3x = 6 => x = 2

4a) 2x = 4a + 10
x = 2a + 5

b) 3x = 5a - 12
x = 5/3 a - 4

c) 2x + 3a = 18
2x = 18 - 3a
x = 9 - 3/2 a

d) 3x - 4a = 24
3x = 4a + 24
x = 4/3 a + 8

5a) y = 2x + 7
y = 2(3) + 7
y = 6 + 7
y = 13

b) y = 2x + 7
y = 2(8) + 7
y = 16 + 7
y = 23

c) y = 2x + 7
y = 2(-4) + 7
y = - 8 + 7
y = - 1

d) y = 2x + 7
y = 2(-7) + 7
y = - 14 + 7
y = -7