Answer:

Step-by-step explanation:

Distribute 6 through the parentheses
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Move 18 to right hand side and change it's sign
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Subtract 18 from 42
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Divide both sides of the equation by -6
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Calculate
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Hope I helped!
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Answer:
4 quarts
Step-by-step explanation:
3 hours because 8-5= 3 for 3 total hours more