Giselle works as a carpenter and as a blacksmith. she earns $20 dollar 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

hours and as a blacksmith for

hours last week.

She worked 12 hours as a carpenter and 18 hours as a blacksmith last week.

Step-by-step explanation:

Let x be the number of hours for which she worked as a carpenter and y be the number of hours for which she worked as a blacksmith,

Since, total numbers of hours she worked = 30,

⇒ x + y = 30 (1)

Also, she earned total $ 690 in which she earned $20 dollar per hour as a carpenter and $25 per hour as a blacksmith.

⇒ 20 x + 25 y = 690 (2)

Equation (2) - 20 × Equation (1),

We get,

5 y = 90 ⇒ y = 18

After substituting this value in equation (1),

We get, x = 12,

Hence, She worked as a carpenter = x hours = 12 hours

And, as a blacksmith = y hours = 18 hours

12 and 18

Step-by-step explanation:

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