Question

Tolong jwbnya dengan metode eliminasi / subttitusi. gw minta tolong
2x + 3y = a
x - y = b

Answer 1

SUBTITUSI:
2x+3y=a
x-y=b=>-y=b-x
           y=-b+x

2x+3y=a
2x+3(-b+x)=a
2x-3b+3x=a
5x-3b=a
5x=a+3b
x=a+3b/5

y=-b+x
y=-b+a+3b/5
___________ . 5(dikali 5)
y=-5b+5a+3b
y=-2b+5a