Question

Câu 8 (1 điểm): Tìm y

3/5+  y  =7/8 +  1/4                            13/5 -  y  = 1/4 : 2  

Answer 1

a) 3/5+y=9/8

y= 21/40

b) 13/5-y= 1/8

y=99/40

Answer 2

3/5+  y  =7/8 +  1/4 

y= 7/8 + 1/4 -3/5

y= 35/40 + 10/40 - 24/40

y=(35+10-24)/40

y=21/40

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13/5 - y = 1/4 : 2

y = 13/5 - 1/4 x 1/2

y = 13/5 - 1/8

y = 104/40 -5/40

y = 99/40

Answer 3

a) 3/5+y=9/8

y= 21/40

 b) 13/5-y= 1/8

 y=99/40