julie8669
21.04.2021 •
Mathematics
A boy and his sister together weighs 60kg. If the boy is 6.8kg heavier than his sister, calculate his sister's weight
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Ответ:
X=7.6923
Step-by-step explanation:
Let’s make his sister x
we know that 6.8x+x=60
so 7.8x=60
now just simply divide each side by 7.8
X= aproxamately 7.6923
Ответ: