Respuesta :
Answer:
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Step-by-step explanation:
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Answer:
x=6
Step-by-step explanation:
you subtract 7.7 from both sides
12.4x+7.7-7.7=82.1-7.7
then you're left with
12.4x=74.4
divide by 12.4 on both sides
12.4x/12.4=74.4/12.4
x=6