Algebra Genius Needed

1) Which Line Has the mistake:
3-4x=10x+10
Line 1) 3=14x+10
Line 2) -7=14x
Line 3) -2=x

2) Solve: x-7=14
3)

4) Complete the next step: Step1:4d-12=12-4d
Step2:4d-24=-4d
Step3:
Step4:3=d
Solve:
5)2-x=13

1) Line 3, x =-7/14 = -1/2
2) x =14+7 =21
4) -24 = -8d
5) x = -11
Where is Q3?

Sorry. I wish i could help. But you should be doing your own homework. 2 is very simple - just reverse it. 14+7 = ?