Question 101864
Lets look at this one closely...

3x+5=10-x

Obviously, the value of "x" must be found out another way..

So you have to try out some numbers..

Attempt 1:

x=5

3x+5=10-x
15+5=10-x

Ok we already see that that is totally wrong.. lets try lower

Attempt 2:

x=2

3x+5=10-x
6+5-10-x

This is STILL not correct.. the only whole number left is 1..

Attempt 3:

3x+5=10-x
3+5=10-1

Now this is too high so lets go between 1 and 2.. we know it's in that range so lets try 1.5

Attempt 4:

3x+5=10-x
4.5+5=10-x
9.5=10-1.5

That is still not it, so this is too high.. lets go between 1 and 1.5 which is 1.25

Attempt 5:

3x+5=10-x
3.75+5=10-x
8.75=10-1.25
8.75=8.75

It looks like we found the answer! x= 1.25