5,3х + 4,9х = 102
10,2х = 102
х= 102 : 10,2
х = 10
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5,3х + 4,9х = 102
10,2х = 102
х= 102 : 10,2
х = 10
10,2х=102
10,2х:10,2=102:10,2
х=10