So I've just started working with algebra for the first time ever, and naturally have a lot to learn about it. So figured instead of spamming the algebra section with threads I'd just ask for algebra help in this one thread.

My first problem is doing linear equations with fractions, I can do some basic ones but I can't get the proper answers for these few-

$\displaystyle 2/3x-1 = 3/7$ (x should somehow equal 17/9)

$\displaystyle 2(x - 1)/3 - x+4/2 = 5/6$ (x should somehow equal 21)

$\displaystyle x+1/2x-1 = 3/4$ (x should somehow equal 7/2)

I tried doing these myself but none of my answers coincide with the actual answers