Question

Tolong bantu dong teman teman no.1&3
Trima kasih..

Answer 1

1.x=2y-5
4x-5y=0
4 (2y-5)-5y=0
8y-20-5y=0
3y=20
y=20/3
x=2y-5
=2 (20/3)-5 = 40/3-5= 40/3-15/3
x= 25/3
hp {25/3, 20/3}

3.3x+y=5 -------y= -3x+5
2x-3y=7
2x-3 (-3x+5)=7
2x+9x-15=7
11x=22
x=2
y=-3x+5 = -3 (2)+5 =-1
cek lagi yeee