SPLDV x+y=9 dan 2x+1=x+y

Kelas 8 Matematika
Bab SPLDV

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

x + y = 9
x + x + 1 = 9
2x = 9 - 1
x = 8/2
x = 4

y = x + 1
y = 4 + 1
y = 5

Maka, x = 4 dan y = 5

x + y = 9
y = 9 - x

2x + 1 = x + y
2x + 1 = x + 9 - x
2x + 1 = 9
2x = 9 - 1
2x = 8
x = 4

x + y = 9
4 + y = 9
y = 9 - 4
y = 5

HP = { 4 , 5 }