Where did the 2 come from and explain how you would write a division sentence

Chris is wrong. He added his 2 instead of carrying it. So the 2 came from when he was multiplying 6 x 4 (witch is 24). But the correct answer to that problem would be 648. 

Hope this helped

1) add 6 to 24, write the rest of the equation 10-2x= 30 subtract 10 from 30 2x=20 divide 20 by 2 and x=102) add 3 to -9 write the rest of the equation 4x+3=-6 subtract 3 from -6 4x=-9 x= -2.25  i don't know the rest sorry