Question

7x-5=8x+4. Find x. Explain your steps.

Answer 1

1.

Answer 2

I said explain all steps

Answer 3

First you subtract 4, and you get
7x-1=8x. then subtract 7x from 8x, and you get -1=x. so my bad, it's -1 not 1.

Answer 4

That's it :)

Answer 5

the idea is to isolate x, so we need to get all the x terms to one side and everything else to the other

Answer 6

7x-5=8x+4

7x-5-8x=8x+4-8x ... Subtract 8x from both sides.

-x-5=4 ... Combine like terms (notice how the 8x terms cancel on the right)

I'll let you finish up

Answer 7

okay i got x=-1

Answer 8

Thanks guys

Answer 9

no, that's not correct

Answer 10

but I can see how you got that

Answer 11

Stupid me. I know all the hard things but forgot how to do this easy problem. -_-

Answer 12

you need to add 5 to both sides to undo the minus 5

-x-5=4

-x-5+5=4+5 ... Add 5 to both sides.

-x + 0 = 9 ... Combine like terms.

-x = 9

x = ???

and don't say that about yourself, we all make silly mistakes

Answer 13

wait hold on this is what I did