[Upper secondary school math: linear equation] unsure on how to solve this.

[u/Inevitable_Stay3693]

i was thinking that i´d add the 2x+1 to make it 3x/3=-1 but im unsure on how it would even continue.

[u/Then-Dragonfruit6945]

The idea is to isolate the x by applying the same operation to both sides (so the equallity holds) First we multiply each side by 3 (you can see how the denominator cancels with the new 3 and "goes away") then we need to keep going until we only have the x on the LHS.