X=3 because you subtract the three on both sides to get x alone. So you get: 7x=21 then you divide seven by 21 and get x=3
It’s 12.4 just look at your decimal points
Its not larger. 8*10*7 is larger :)
The answer is step 2, he should have subtracted the 9 or added the six when he was moving x's...
