Answer:
x-2y=6
x=2y+6
x•2-4y•2=24
(2y+6)•2-4y•2=24
(2y+6)•2-8y=24
4y+12-8y=24
12-4y=24
-4y=12
y=-3
a=x+2y+(x+2y)•2+(x+2y)•3+(x+2y)•4
a=(2y+6)+2y+((2y+6)+2y)•2+((2y+6)+2y)•3+((2y+6)+2y)•4
a=(2(-3)+6)+2(-3)+((2(-3)+6)+2(-3))•2+((2(-3)+6)+2(-3))•3+((2(-3)+6)+2(-3))•4
a=(-6+6)-6+((-6+6)-6)•2+((-6+6)-6)•3+((-6+6)-6)•4
a=0-6-6•2-6•3-6•4
a=-6-12-18-24
a=-60
OR
x-2y=6
x=2y+6
Utilizați FOIL
Step-by-step explanation:
