tentukan hasil nya jika x=1 & y=-1 2(2x-y+1) -3(x+y)

2(2x-y+1)-3(x+y)
= 2(2(1)-(-1)+1) -3(1+(-1))
= 2(2+1+1) -3+3
= 4+2+2-3+3
= 8

2(2x - y+1) -3(x+y)
2(2(1) - (-1)1+1) - 3(1 + (-1)
2 ( 2 +1+1) - 3 ( 0)
2(4) - 0
8-0
8

^_^