Question

Chris Nazarro had total travel expenses of $872. His transportation cost was $136. The hotel cost was $210 and business materials cost $500. If his lunch cost 30% of his dinner, how much was dinner to the nearest cent?

Answer 1

`\$20`

Explanation:

Let

x-----> the cost of his lunch

y----> the cost of his dinner

we know that

`x+y=872-136-210-500`

`x+y=26` -----> equation A

`x=0.3y` ---> equation B

substitute equation B in equation A

`0.3y+y=26`

`1.3y=26`

`y=\$20` -----> the cost of the dinner