Question

Найдите х в пропорциях : 6) 0,25/4х+1 = 0,3/8,4

Answer 1

0.25*8.4=(4х+1)*0.3
2.1=(4х+1)*0.3
4х+1=2.1:0.3
4х+1=7
4х=7-1
4х=6
х=6:4
х=1.5
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