Question

ajuda pfvr nao consigo fazer ​

Answer 1

$\frac{x+3}{\:4}=\frac{x+9}{7}$

$7\cdot \left(x+3\right)=4\cdot \left(x+9\right)$

$7x+21=4x+36$

$7x-4x=36-21$

$3x=15$

$x=\frac{15}{3}$

$x=5$

$\frac{x+5}{5\:}=\frac{3x-5}{10}$

$10*(x+5)=5*(3x-5)$

$10x+50=15x-25$

$15x-10x=50+25$

$5x=75$

$x=\frac{75}{5}$

$x=5$

$\frac{x+3}{3\:}=\frac{20}{6}$

$6*(x+3)=3*20$

$6x+18=60$

$x=\frac{42}{6}$

$x=7$

Answer 2

Resposta:

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Explicação passo-a-passo: