I have another question. solve the equation:
3x-5=2x+7 So, do I combine like terms?

Question

I have another question.  solve the equation:
3x-5=2x+7   So, do I combine like terms?

anonymous · Answer

you divide three on both sides

mathteacher1729 · Answer

Are you trying to solve this algebraically?

If so, you should subtract 2x from both sides:

$$x-5=7$$

Then add 5 to both sides

$$x=12$$

Test this to make sure it works:

$$3(12)-5=2(12)+7$$

$$36 -5=24+7$$

$$31=31$$

Yay! :D

mathteacher1729 · Answer

I would strongly recommend graphing this to help understand that it's really the intersection of two lines.

Let $$y_1=3x-5$$ and $$y_2=2x+7$$

You will see that they intersect at the exact (x,y) coordinate of (12,31) :)

anonymous · Answer

Yes, the answer in the book was x=12.. Thanks yet again!!

mathteacher1729 · Answer

(on a TI calculator to find the intersection you may have to zoom out and then type 2nd > calc > intersect. )

Hope this helps!

anonymous · Answer

once I intersect I get x=12 and Y=31 on the TI