Question

1)Tìm y

a) y*3+y*5+y-289=7829

b)4*8+19-y=28

Answer 1

a)y x (3+5+1)=7829+289=8118

  y x 9=8118

  y=902

Vậy y=902

b)32+19-y=28

  51-y=28

  y=51-28

  y=23

Vậy y=23

Học giỏi nhé!!! ^.^

Answer 2

a ) y x ( 3+5+1) = 7829 + 289

y x 9 = 8118

y = 8118 : 9 902

b  )  32 + 19 - y = 28

51 - y =28

y = 28 + 51

y = 79