4,7х-(2,5х+12,4)=19
4,7х-2,5х-12,4=19
2,2х=19+12,4
2,2х=31,4
х=31,4:2,2
х=14 и 6/22= 14 и 3/11
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4,7х-(2,5х+12,4)=19
4,7х-2,5х-12,4=19
2,2х=19+12,4
2,2х=31,4
х=31,4:2,2
х=14 и 6/22= 14 и 3/11