Systems of equations word problems

Giselle works as a carpenter and as a blacksmith. She earns $\$20$ per hour as a carpenter and $\$25$ per hour as a blacksmith. Last week, Giselle worked both jobs for a total of $30$ hours, and earned a total of $\$690$. **How long did Giselle work as a carpenter last week, and how long did she work as a blacksmith?** Giselle worked as a carpenter for [[☃ numeric-input 1]] hours and as a blacksmith for [[☃ numeric-input 2]] hours last week.