1>y-25=120.4
y-25=480
y=505
2>4 nhân (x+25)=120
x+25=30
x=5
1) ( y-25):4 - 120 = 0 2) 120 - ( x+25 )x4 = 0
( y-25 ):4 = 0+120 (x+25) x4 =120-0
( y-25):4 =120 (x+25) x4 =120
( y-25)=120x4 (x+25)=120:4
y-25=480 x+25=30
y=480+25 x=30-25
y=505 x=5
k mk nha
1}(y-25):4-120=0
(y-25):4=120
y-25=120 x 4
y-25=480
y=505
2}120-(x+25)x4=0
(x-25)x4=120
x-25=120:4
x-25=30
x=5
Ủng hộ mk nh các bạn ai k mk mk k lại