Molly666
02.06.2021 •
Mathematics
Jessica weights 8/9 as heavy as Kelly. Their total mass is 68kg. How much heavier is Kelly than Jessica?
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Ответ:
v = - 3
Step-by-step explanation:
Given
5(5 + 5v) = - 29 + 7v ← distribute parenthesis on left side
25 + 25v = - 29 + 7v ( subtract 7v from both sides )
25 + 18v = - 29 ( subtract 25 from both sides )
18v = - 54 ( divide both sides by 18 )
v = - 3