Question

[lê hồng anh]

y x 9 + y = 100

tk mik mik tk lại

Answer 1

[nguyen thi lan huong]

y x 9 + y = 100

y x 9 + y x 1 = 100

y x ( 9 + 1 ) = 100

y x 10 = 100

y = 100 : 10

y = 10

Answer 2

[Tiểu Đào]

y x 9 + y = 100

y x 10 = 100

y         = 100 : 10

y         = 10