Answer:
answer is c. x=-4
Step-by-step explanation:
7x+6=-22 =》 7x=-28 =》 x=-24/7=-4
Answer: 10 hours
Explanation:
Bill = $720
Material = $375
Labour = $34.50x
375 + 34.5x = 720
34.5x = 345
x =10
b = 2a
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