Ответ:
0.25:0.4=1.35:(0.3х)
25/40=1.35:0.3x
0.3x=1.35:25/40
0.3x=2.16
x = 2.16:0.3
x=7.2
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Ответ:
0.25:0.4=1.35:(0.3х)
25/40=1.35:0.3x
0.3x=1.35:25/40
0.3x=2.16
x = 2.16:0.3
x=7.2