Question

当X等于什么数时,x-(x-1)/3的值与1相等

Answer 1

当X=1时,x-(x-1)/3的值与1相等

x-(x-1)/3=1 两边同时乘以3得

3x-(x-1)=3

3x-x+1=3

3x-x=3-1

2x=2

x=1