As per linear equation, the value of 'x' is 5.
"A linear equation is an equation in which the highest power of the variable is always 1."
The given linear equation is:
[tex]20(20-x)=300[/tex]
⇒ [tex]400-20x = 300[/tex]
⇒ [tex]20x = 400-300[/tex]
⇒ [tex]20x = 100[/tex]
⇒ [tex]x = \frac{100}{20}[/tex]
⇒ [tex]x = 5[/tex]
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