Did he make an error?
4x+6-x=2x+3
1st step: 5x+6=2x+3

yes, what you do to one side you must do to the other. In order to move the x over you must add it to both sides so the first step would be 4x+6=3x+3

4x+6-x=2x+3

1st step: 5x+6=2x+3

YES

He made an error when combine like terms

He's supposed to get 3x from 4x - x

So correct in step 1 should be

3x+6 =2x+3

16

step-by-step explanation:

2 x 40 = 80

80/5

= 16

d

step-by-step explanation:

given

y + 3 = - 4(x - 2) ← distribute the parenthesis

y + 3 = - 4x + 8 ( subtract 3 from both sides )

y = - 4x + 5 → d