3y + 110 = 440
3y = 440 - 110
3y = 330
y = 330 : 3
y = 110
y + 89 + y + 11 + y + 10 = 440
3y + (89 + 11 + 10) = 440
3y + 110 = 440
3y = 330
=> y = 110
y + 89 + y + 11 + y + 10 = 440
( y + y + y ) + ( 89 + 11 + 10 ) = 440
y x 3 + 110 = 440
y x 3 = 440 - 110
y x 3 = 330
y = 330 / 3
y = 110 k mk , mk k lại
y + 89 + y + 11 + y + 10 = 440
3y + ( 89 + 11 + 10 ) = 440
3y + 110 = 440
3y = 440 - 110
3y = 330
y = 330 : 3
y = 110
k mk nha
y+ 89 + y + 11+ y + 10=440
<=> (y+y+y)+ ( 89+11+10)=440
<=>3*y+110=440
=>3*y=440-110
=>3*y=330
=>y=330:3
=>y=110