[tex]-1.9+0.5(7-3b)=(6-4b)*0.4[/tex]
[tex]-19+5(7-3b)=(6-4b)*4[/tex]
[tex]-19+35-15b=24-16b[/tex]
[tex]24-(35-19)=-15b+16b[/tex]
[tex]8=1b[/tex]
[tex]1*b=8[/tex]
[tex]b=8[/tex]
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Answers & Comments
[tex]-1.9+0.5(7-3b)=(6-4b)*0.4[/tex]
[tex]-19+5(7-3b)=(6-4b)*4[/tex]
[tex]-19+35-15b=24-16b[/tex]
[tex]24-(35-19)=-15b+16b[/tex]
[tex]8=1b[/tex]
[tex]1*b=8[/tex]
[tex]b=8[/tex]