\(\dfrac{3}{4}.x+125\)%\(=-4\)
\(\Rightarrow\dfrac{3}{4}.x+\dfrac{125}{100}=-4\)
\(\Rightarrow\dfrac{3}{4}.x+\dfrac{5}{4}=-4\)
\(\Rightarrow\dfrac{3}{4}.x=\left(-4\right)-\dfrac{5}{4}\)
\(\Rightarrow\dfrac{3}{4}.x=-\dfrac{21}{4}\)
\(\Rightarrow x=-\dfrac{21}{4}:\dfrac{3}{4}\)
\(\Rightarrow x=-\dfrac{21}{4}.\dfrac{4}{3}\)
\(\Rightarrow x=-7\)
Vậy \(x\) = -7
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Ta có: \(\dfrac{3}{4}x+125\%\cdot x=-4\)
\(\Leftrightarrow2x=-4\)
hay x=-2
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