8(3a-b)-4(a-7b)=24a-8b-4a+28b=20a+20b
1) 24а -8b - 4a+28b=20a+20b
2) 10-6х-10=4х-8
-6х-4х= -8-10
-10х=-18
х=1,8
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8(3a-b)-4(a-7b)=24a-8b-4a+28b=20a+20b
1) 24а -8b - 4a+28b=20a+20b
2) 10-6х-10=4х-8
-6х-4х= -8-10
-10х=-18
х=1,8