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28-09-2014
Mathematics

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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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