Question

Himpunan penyelesaian dari x = 5 - y dan 2x+3y = 7 tolong please

Answer 1

X=5-y
2x+3y=7

CARA SUBTITUSI:
2x+3y=7
2[5-y]+3y=7
10-2y+3y=7
10+y=7
y=7-10
y=-3

5-y=x
5-[-3]=x
5+3=x
8=x

H{8,-3}