Question

\(\frac{-7}{x}=\frac{-21}{x-34}\)Tìm x 
giúp mình nha gấp lắm

Answer 1

<=> -7(x-34)=-21x <=> -7x+238+21x=0 <=>14x=-238 => x=-17

ĐS: x=-17

Answer 2

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mk k biet xin loi ban nha!!!!!

mk k biet xin loi ban nha!!!!!

mk k biet xin loi ban nha!!!!!

Answer 3

\(\Leftrightarrow-21x=-7\left(x-34\right)\)

\(\Leftrightarrow-21x=-7x+238\)

\(\Leftrightarrow-21x+7x=238\)

\(\Leftrightarrow-14x=238\Rightarrow x=238:\left(-14\right)=-17\)