8,75 x y + 1,25 x y = 20
( 8,75 + 1,25 ) x y = 20
10 x y = 20
y = 20 : 10
y = 2
8,75 x y + 1,25 x y = 20
y x ( 8,75 + 1,25 ) = 20
y x 10 = 20
y = 20 : 10
y = 2
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y = 2.
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Ai tk cho mình mình tk lại.
\(8,75\times y+1,25\times y=20\)
\(\left(8,75+1,25\right)\times y=20\)
\(10\times y=20\)
\(y=20:10\)
\(y=2\)
Vậy y = 2
8,75 x y + 1,25 x y = 20
y x ( 8,75 + 1,25 ) = 20
y x 10 = 20
y = 20 : 10
y = 2
8,75.y+1,25.y=20
(8,75+1,25).y=20
10.y = 20
y=20 :10
y=2
Vậy y=2
8,75.y+1,25.y=20
(8,75+1,25).y=20
10.y = 20
y=20 :10
y=2
Vậy y=2
8,75.y+1,25.y=20
(8,75+1,25).y=20
10.y = 20
y=20 :10
y=2
Vậy y=2
8,75 x y + 1,25 x y = 20
(8,75+1,25) x y = 20
10 x y = 20
y = 20 : 10
y = 2
Hưỡng dẫn:
8,75 x y + 1,25 x y = 20
( 8,75 + 1,25 ) x y = 20
10 x y = 20
y = 20 : 10
y = 2
8,75 x y + 1,25 x y = 20
(8,75 + 1,25 ) x y = 20
10 x y = 20
y = 20:10
y = 2
8,75xy+1,25xy=20
xy(8,75+1,25)=20
10xy=20
xy=20:10
xy=2
Ta có 2=2.1 nên
x=1:y=2 hoặc x=2; y=1
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