Решите уранение 5 1/4х= 3.2 * 2.1

[latex] 5 \frac{1}{4}x=3.2*2.1 [/latex] [latex] \frac{21}{4} x= \frac{672}{100} [/latex] [latex]x= \frac{ \frac{672}{100} }{4/21} [/latex] [latex]x= \frac{32}{25}= 1 \frac{7}{25} = 1.28 [/latex]

5[latex] \frac{1}{4} [/latex] *х=3,2*2,1 [latex] \frac{21}{4} [/latex]*х:[latex] \frac{21}{10} [/latex]=3,2 делим) [latex] \frac{10}{4} [/latex]*х=[latex] \frac{32}{10} [/latex] х=[latex] \frac{32}{10} : \ \frac{4}{10} [/latex] х=32/4 х=8