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Daca 7(a+4)=2(b+14)si a,b este R determinati valoarea raportului a supra b

Răspuns :

Abc112
[tex]7(a + 4) = 2(b + 14)[/tex]

[tex]7a + 28 = 2b + 14[/tex]

[tex]7a + 28 - 14 = 2b[/tex]

[tex]7a + 14= 2b \: | \div b[/tex]

[tex] \frac{7a + 14}{b} = 2[/tex]

[tex] \frac{7a}{b} + \frac{14}{b} = 2[/tex]

[tex]7 \times \frac{a}{b} + \frac{14}{b} = 2 \: | \div 7[/tex]

[tex] \frac{a}{b} + \frac{2}{b} = \frac{2}{7} [/tex]

[tex] \frac{a+2}{b} = \frac{2}{7} [/tex]

[tex] \frac{a }{b} +\frac{2}{b}= \frac{2}{7} [/tex]

[tex] \frac{a}{b} = \frac{2}{7} -\frac{2}{b}[/tex]

[tex] \frac{a}{b} = \frac{2b}{7b}-\frac{14}{7b} [/tex]

[tex] \frac{a}{b} = \frac{2b-14}{7b}[/tex]

[tex] \frac{a}{b} = \frac{2(b-7)}{7b} [/tex]

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