Question

Tìm x

x - (1-x)=5+(-1+x)

Answer 1

x-(1-x)=5+(-1+x)

x-1+x =5-1+x

=> x = 5

Vậy x = 5

Answer 2

x - (1 - x) = 5 + (-1 + x)

=> x - 1 + x = 5 -1 + x

=> x + x - x = 5 - 1 + 1

=> x = 5

Vậy x = 5