Pemisalan x=0
-18 + 4x - y =-16
-18 + 4.0 -y =-16
-y = -16 +18
y= 2
-18 +4x -y =-16
-18 +4x-0 = -16
4x =-16+18
x=2:4 =1/2
5.1/2+2.2
5/2 +4
5/2 +8/2
=13/2
diketahui sistem persamaan 2x kurang 3y= min 18 dan 4x kurang y=min 16 nilai 5x+2y adalah
-18 +4x -y =-16
-18 +4x-0 = -16
4x =-16+18
x=2:4 =1/2
5.1/2+2.2
5/2 +4
5/2 +8/2
=13/2