a) [tex]x-3,25 =\dfrac{7}{4} \Rightarrow x-3,25=1,75 \Rightarrow x=1,75+3,25 \Rightarrow x=5 .[/tex]
b) [tex]2,35+x=3\dfrac{1}{4}\Rightarrow 2,35+x =3,25 \Rightarrow x=3,25-2,35 \Rightarrow x=0,9[/tex]
c)
[tex]3,2-x=\dfrac{6}{5}|_{\cdot 5} \Longrightarrow 16-5x=6 \Longrightarrow 16-6=5x
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\Longrightarrow 10=5x \Longrightarrow x=2[/tex]
Sau:
[tex]3,2-x=\dfrac{6}{5}\Longrightarrow 3,2-x=1,2\Longrightarrow x=3,2 -1,2 \Longrightarrow x=2 [/tex]
Sau:
[tex]3,2-x=\dfrac{6}{5}\Longrightarrow \dfrac{\ 32^{(2}}{10}-x=\dfrac{6}{5} \Longrightarrow \dfrac{16}{5}-x=\dfrac{6}{5}
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\Longrightarrow \dfrac{16}{5}=\dfrac{6}{5}+x \Longrightarrow x+\dfrac{6}{5} =\dfrac{16}{5}\Longrightarrow x=\dfrac{16}{5}-\dfrac{6}{5} \Longrightarrow x=\dfrac{10}{5}
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\Longrightarrow x=2.[/tex]
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