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- #1
Hi kmooney,you need to put the 1/2x on both sides
No, while we can mutiply across when multiplying fractions, we cannot add across when adding them. We need to get a common denominator, then put the sum of the numerators over this common denominator. For example:15/1+1/2=16/3
Why would you first subtract through by $\dfrac{1}{2}$? It is okay, but seems overly complicated, to then have to add it back after multiplying through by 2.15+ 1/2 =0.60(20x)
multiply 0.60(20x)=12.00x
The answer be 12x
15+ 1/2=12x
15=12x-1/2 hence a+b=c then a=c-b
find LCM of 2 and 1
then [24x-1]/2
15=[24x-1]/2
15*2=24x-1 hence a/b=c then a=bc
30=24x-1
31=24x
x=31/24