Respuesta:
[tex]\frac{1}{4}+\frac{2}{5}+x=1 \\\\x=1-\frac{1}{4}+\frac{2}{5}\\\\1-\frac{1}{4}=\frac{4-1}{4}=\frac{3}{4} \\\\x=\frac{3}{4}-\frac{2}{5}\\\\\frac{3}{4}-\frac{2}{5}=\frac{15-8}{20}=\frac{7}{20}\\\\x=\frac{7}{20}[/tex]
Explicación paso a paso:
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Respuesta:
[tex]\frac{1}{4}+\frac{2}{5}+x=1 \\\\x=1-\frac{1}{4}+\frac{2}{5}\\\\1-\frac{1}{4}=\frac{4-1}{4}=\frac{3}{4} \\\\x=\frac{3}{4}-\frac{2}{5}\\\\\frac{3}{4}-\frac{2}{5}=\frac{15-8}{20}=\frac{7}{20}\\\\x=\frac{7}{20}[/tex]
Explicación paso a paso: