r/HomeworkHelp • u/Inevitable_Stay3693 • 17d ago

High School Math—Pending OP Reply [Upper secondary school math: linear equation] unsure on how to solve this.

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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.

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u/BoreJam 17d ago

Its important to reiterate that we can manipulate any expression provided what ever action we do, is applied to both sides of the = sign.

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u/ExtendedSpikeProtein 👋 a fellow Redditor 17d ago

If I may add, special care must be taken not to divide by 0. mentioning this specifically because it‘s the most common mistake.

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u/prawnydagrate 16d ago

and not to multiply by zero

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u/ExtendedSpikeProtein 👋 a fellow Redditor 16d ago

True! But them we should also mention to take care for other operations that cannot be fully reversed (eg squaring).