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Natalka [10]
1 year ago
11

How do you simplify 2x + 2x -9 =15

Mathematics
1 answer:
vivado [14]1 year ago
8 0

Step-by-step explanation:

4x-9=15

Solutuon

4x-9=15

4x=15-9

4x=6

x=6:4

x=1,5

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let's firstly, convert the mixed fractions to improper, and then do equation.


\bf \stackrel{mixed}{3\frac{4}{5}}\implies \cfrac{3\cdot 5+4}{5}\implies \stackrel{improper}{\cfrac{19}{5}}
~\hfill
\stackrel{mixed}{2\frac{5}{7}}\implies \cfrac{2\cdot 7+5}{7}\implies \stackrel{improper}{\cfrac{19}{7}}
\\\\[-0.35em]
\rule{34em}{0.25pt}


\bf \cfrac{~~\frac{19}{5}~~}{x}=\cfrac{19}{7}\implies \cfrac{~~\frac{19}{5}~~}{\frac{x}{1}}=\cfrac{19}{7}\implies \cfrac{19}{5}\cdot \cfrac{1}{x}=\cfrac{19}{7}\implies \cfrac{19}{5x}=\cfrac{19}{7}
\\\\\\
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