\(38y-34y-y=4503\)
\(\left(38-34-1\right)y=4503\)
\(3y=4503\)
\(y=1501\)
vậy \(y=1501\)
\(2y+7y+y=210\)
\(\left(2+7+1\right)y=210\)
\(10y=210\)
\(y=21\)
vậy \(y=21\)
a. y x 38-34 x y - y = 4503
y x 38-34 x y - y x1 = 4503
y x ( 38- 34 -1 ) = 4503
y x 3 = 4503
y = 4503 : 3
y = 1501
b. 2 x y + 7 x y + y = 210
2 x y + 7 x y + y x 1 = 210
y x ( 2 + 7 + 1 ) = 210
y x 10 = 210
y = 210 : 10
y = 21
( Chà, lớp 4 mà đề cx khá khó đấy ! )
a) yx 38- 34x y- y= 4503.
yx 38- 34x y- yx 1= 4503.
yx( 38- 34- 1)= 4503.
yx 3= 4503.
y= 4503: 3.
y= 1501.
Vậy y= 1501.
b) 2x y+ 7x y+ y= 210.
2x y+ 7x y+ yx 1= 210.
yx( 2+ 7+ 1)= 210.
yx 10= 210.
y= 210: 10.
y= 21.
Vậy y= 21.
