Question

Determine a raiz
A)Y=4x/7 - 5/11
B)Y=2x/3 - 8/9
C)y=6x/5 - 21/20

Answer 1

Resposta:

Explicação passo-a-passo:

Para achar a raiz faça y=0

a) y=0

$\displaystyle \frac{4x}{7}-\frac{5}{11} =0\\\\\\\frac{4x}{7}=\frac{5}{11} \\\\\\11.4x=5.7\\44x=35\\\\x=\frac{35}{44}$

b) y=0

$\displaystyle \frac{2x}{3} -\frac{8}{9} =0\\\\\\\frac{2x}{3} =\frac{8}{9}\\\\9.2x=8.3\\18x=24\\\\x=\frac{24\div6}{18\div6}= \frac{4}{3}$

c) y=0

$\displaystyle \frac{6x}{5} -\frac{21}{20} =0\\\\\\\frac{6x}{5} =\frac{21}{20}\\\\20.6x=5.21\\120x=105\\\\x=\frac{105\div15}{120\div15} =\frac{7}{8}$