tentukan himpunan penyelesaian dari sistem persamaan berikut 4x+5y=7 2x+3y=5

4x + 5y = 7 |×1
2x + 3y = 5 |×2

4x + 5y = 7
4x + 6y = 10
_________ _
-y = -3
y = 3

Substitusi y = 3 ke salah satu persamaan

2x + 3y = 5
2x + 9 = 5
2x = -4
x = -2

HP = { -2, 3 }

Langsung aja y

4x + 5y = 7 (×1)
2x + 3y = 5 (×2)

4x + 5y = 7
4x + 6y = 10
__________-
-y = -3
y = 3

2x + 3y = 5
2x = 5 - 3.3
2x = -4
x = -2

HP {-2 , 3}

Semoga berguna +_+