Question

Nilai Y yang menuhi SPLDV
x + 2y = 11
3x -y = 5

adalah...

jelaskan pakai cara

Answer 1

x + 2y = 11
x = 11 - 2y
substitusi :
3x -y = 5
3( 11 - 2y) - y = 5
33 - 6y - y = 5
-7y = 5 - 33
-7y = - 28
y = -28 : -7
y = 4
x = 11 - 2y
x = 11 - 2(4)
x = 11 - 8
x = 3
semoga membantu :)