Question

Whats the difference of the two expression? (3/7x+9)-(2/7x-3)

Answer 1

`\left((3)/(7)x+9\right)-\left((2)/(7)x-3\right)\\\\=(3)/(7)x+9-(2)/(7)x-(-3)\\\\=(3)/(7)x+9-(2)/(7)x+3\\\\=((3)/(7)x-(2)/(7)x)+(9+3)\\\\=(3-2)/(7)x+12\\\\=\boxed{(1)/(7)x+12}`