tentukan penyelesaian sistem persamaan linear dua variabel dan metode substitusi { 2 x + 3 y = 11. x - 2 y = - 12.

2x + 3y = 11
x - 2y = -12 <=> x = 2y-12

2x + 3y = 11
2(2y-12) +3y = 11
4y -24 + 3y = 11
4y +3y = 11+24
7y = 35
y = 35/7
y= 5

x-2y = -12
x-10= -12
x= -12+10
x= -2