They forgot to distribute the 3 over to the 1. the correct work should look like:
3(x+1)=6
3x+3=6
3x=3
x=1
Remove the radical by raising each side to the index of the radical. a = √ 3 , − √ 3 a=3,-3 a ≈ 1.73205080 , − 1.73205080
<span>6x-3y=27 --> 3*(2x-y = 9)
3x-y=13 Doesn't factor</span>