0,5х+2,5х-0,68=1,72
3х - 0.68 = 1.72
3х = 1.72 + 0.68
3х = 2.4
х = 0.8
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0,5х+2,5х-0,68=1,72
3х - 0.68 = 1.72
3х = 1.72 + 0.68
3х = 2.4
х = 0.8
0,5х+2,5х=1,72+0,68
3х=2,4
х=2,4:3
х=0,8