Answer:
x= -21
Step-by-step explanation:
6/7x=-18
divide both sides by 6/7
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x= -21
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Answer:
20
Step-by-step explanation:
20 is the GCF or greatest common factor of 20 and 100.
Answer: 
<u>Step-by-step explanation:</u>

No I do not know how to do this
Answer:
$350
Step-by-step explanation:
3 lawns --------------> $105
find unit rate:
1 lawn -------------> $105 ÷ 3 = $35 per lawn
10 lawns --------> $35 per lawn x 10 lawns = $350