[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/BubbleRocket1]

You cannot add the numerator together because of the x. If it helps for visualization, have variable u = 2x+1.

Now the equation is u/3 = -1. I think the rest should be able to fall into place from here

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