Giselle works as a carpenter and as a blacksmith.
she earns \$20$20dollar sign, 20 per hour as a carpenter and \$25$25dollar sign, 25 per hour as a blacksmith. last week, giselle worked both jobs for a total of 303030 hours, and earned a total of \$690$690dollar sign, 690.
how long did giselle work as a carpenter last week, and how long did she work as a blacksmith?

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