Question

Tìm X biết 3.(X-3)-X=1

Answer 1

3.(x-3)-x=1

3.x-3.3-x=1

3x-9-x=1

3x-x-9=1

2x - 9=1

2x=9+1

2x=10

x=10:2

x=5

cho 1 đúng nhé bạn hiền

Answer 2

3(x - 3) - x = 1

=> 3(x - 3) - x + 3 = 4

=> 3(x - 3) - (x - 3) = 4

=> (x -3)(3 - 1) = 4

=> x - 3 = 2

=> x = 2 + 3

=> x = 5