rubyvalentin1 rubyvalentin1

01-09-2015
Mathematics

contestada

Identify as expression or equation 9=2x-4

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antonio9990 antonio9990

01-09-2015

[tex]\text{We know: 9=2x-4 ; x=?} \\\\ 9=2x-4 \iff \boxed{2x-4=9} \\ \\ 2x-4=9\\2x=9+4\\2x=13\\ \boxed{x=6.5} \\ \\ \text{Check:} \\ 9=2*6.5-4\\9=13-4\\ \ 9=9 \ \text{true} \\\\\huge{ \text{The answer is x=6.5}}[/tex]

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leumitica leumitica

02-09-2015

9=2x-4
2x=9+4
2x=13
x=31:2
x=6,5

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