Hi, could I have some help with these questions.

\(\displaystyle 1+\frac x{2} = \frac {x-3}{4}\)

do I times by the lowest common denominator, so 4?

but the answer is \(\displaystyle -7\) and I don't get how you get to that?

Also these questions:

\(\displaystyle x+1 = \frac2{x}\)

and

\(\displaystyle \frac3{x-1} - \frac8 {x+2} = 1\)

\(\displaystyle 1+\frac x{2} = \frac {x-3}{4}\)

do I times by the lowest common denominator, so 4?

but the answer is \(\displaystyle -7\) and I don't get how you get to that?

Also these questions:

\(\displaystyle x+1 = \frac2{x}\)

and

\(\displaystyle \frac3{x-1} - \frac8 {x+2} = 1\)

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