Question

25%×x+x=-

1,25

Answer 1

Đề: \(25\%.x+x=-1,25\) 

\(\Leftrightarrow25\%.2x=-1,25\)

\(\Leftrightarrow\frac{25}{100}.2x=-\frac{125}{100}\)

\(\Leftrightarrow\frac{1}{4}.2x=\frac{5}{4}\)

\(\Leftrightarrow2x=\frac{5}{4}:\frac{1}{4}=\frac{5}{4}.4\)

\(\Leftrightarrow2x=5\)

\(\Leftrightarrow x=5:2=\frac{5}{2}\)

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