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2(9-y)+3y=24
18-2y+3y=24
18+y=24
y=24-18
y=6
×=9-6
×=3
-
x+y= 9. |.2 | =2x+2y=18
= 1y = 6
= y = 6:1 = 6
2x+3y=24
2x+3.6=24
2x+18=24
2x=24-18
2x= 6
x = 6:2=3