Question

0.3(0.4x-1.2)+0.36x=3.4
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Answer 1

0,3(0,4х-1,2)+0,36х=3,4
0,12х-0,36+0,36х=3,4
0,48х=3,4+0,36
0,48х=3,76
х=3,76/0,48
х=7целых 5/6