Hong works as a tutor for $8 an hour and as a waiter for $7 an hour. This month, he worked a combined total of 100 hours at his two jobs.

Let t be the number of hours Hong worked as a tutor this month. Write an expression for the combined total dollar amount he earned this month.

Question

Hong works as a tutor for $8 an hour and as a waiter for $7 an hour. This month, he worked a combined total of 100 hours at his two jobs.

Let t be the number of hours Hong worked as a tutor this month. Write an expression for the combined total dollar amount he earned this month.

anonymous · Answer

8t + 7x = 100

solomonzelman · Answer

I don't think this is correct.
100 is not the total earning,
it is the number of hours.

solomonzelman · Answer

$\large\color{#CC3300}{ \displaystyle t+x  }$  is the total number of hours,
and thus you have:     $\large\color{#CC3300}{ \displaystyle t+x =100 }$

solomonzelman · Answer

However this is not the total earning, rather, just the hours worked.

solomonzelman · Answer

The total earning would be:
$\large\color{#CC3300}{ \displaystyle 8t+7x  }$

anonymous · Answer

Ohh, I see. I thought it said dollars. My bad.