4х-2.8=0
4х=2.8
х=2.8÷4=0.7
7х+0,4=2х-2.6
5х=-3
х=-3÷5=-0.7
26-3(х+2)=5(3-х)
26-3х-6=15-5х
2х=-5
х=5÷2=-2.5
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4х-2.8=0
4х=2.8
х=2.8÷4=0.7
7х+0,4=2х-2.6
5х=-3
х=-3÷5=-0.7
26-3(х+2)=5(3-х)
26-3х-6=15-5х
2х=-5
х=5÷2=-2.5