gsoreilly
gsoreilly
28-09-2014
Mathematics
contestada
2x - 0.2 (4 - x) = 2.8. Solve for x.
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mariamikayla
mariamikayla
28-09-2014
[tex]0.2=\frac{2}{10} \\\\ 2.8=2\frac{8}{10}=\frac{28}{10} \\\\ 2x^{(10}-\frac{2}{10}(4-x)=\frac{28}{10} \\\\ 20x-2(4-x)=28 \\\\ 20x-8+x=28 \\\\ 21x=28+8 \\\\ 21x=36 \\\\ \boxed{x=\frac{36}{21}=\frac{12}{7}}[/tex]
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