Question

I really need to know the answer to the proportion x-3/x=9 /10

Answer 1

x=30

Step-by-step explanation

`(x-3)/(x)=(9)/(10)`

Step 1

cross multiply

`\begin{gathered} (x-3)/(x)=(9)/(10) \\ 10(x-3)=9x \\ 10x-30=9x \\ \end{gathered}`

Step 2

subtract 9x in both sides

`\begin{gathered} 10x-30=9x \\ 10x-30-9x=9x-9x \\ x-30=0 \\ \end{gathered}`

Step 3

add 30 in both sides

`\begin{gathered} x-30=0 \\ x-30+30=0+30 \\ x=30 \end{gathered}`

I hope this helps you