Question

4,5 x y - y x 125% + y : 5/7 + 1/4 x y = 17,15

Answer 1

4,5 x y - y x 125% + y : 5/7 + 1/4 x y = 17,1

4,5 x y - y x 8 + y .7/5 + 1/4 x y =17,1

y x (4,5-8+7/5+1/4)=17,1

y x (-1,85)=17,1

y=17,1 : (-1,85)

y=.............(tự tính )

Answer 2

\(4,5\times y-y\times125\%+y:\frac{5}{7}+\frac{1}{4}\times y=17,15\)

=> \(4,5\times y-y\times1,25+y\times1,4+0,25\times y=17,15\)

=> \(y\times\left(4,5-1,25+1,4+0,25\right)=17,15\)

=> \(y\times4,9=17,15\)

=> \(y=17,15:4,9\)

=> \(y=3,5\)

Study well ! >_<

Answer 3

à đâu bài nãy sai rồi

4,5 x y - y x 125% + y : 5/7 + 1/4 x y = 17,15

9/2 x y- y x 1/8+ y x 7/5 +1/4 x y = 17,15

y x (9/2 - 1/8 + 7/5 +1/4)=17,15

y x .................=17,15

y=17,15 : ..............

y=....................