5) 5*(х-2.8)=3*(2х-1.8)
5х-14=6х-5.4
х=-8.6
6) 9х-8=5х
4х=8; х=2
7) 9х+24*15=4х+240
5х=-120; х=-120/5; х=-24
8) 2х/9-1/3=4х+5/2
4х-6=18*4х+5*9
-6-45=68х
х=-51/68
х=-3/4
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Answers & Comments
5) 5*(х-2.8)=3*(2х-1.8)
5х-14=6х-5.4
х=-8.6
6) 9х-8=5х
4х=8; х=2
7) 9х+24*15=4х+240
5х=-120; х=-120/5; х=-24
8) 2х/9-1/3=4х+5/2
4х-6=18*4х+5*9
-6-45=68х
х=-51/68
х=-3/4