Question

Resolva as equações:

Answer 1

Explicação passo a passo:

8) $\frac{2x+2}{3}=3x+2\\\frac{2x+2}{3}=\frac{3*(3x+2)}{3} \\ 2x+2=3*(3x+2)\\2x+2=9x+6\\2x-9x=6+2\\-7x=8\\x=-\frac{8}{7}$

9)$\frac{x}{2} +\frac{3}{2} =1-\frac{7}{10} \\\frac{5x+15}{10} =\frac{10-7}{10} \\5x+15=10-7\\5x=-15+10-7\\5x=-12\\x=-\frac{12}{5}$

10)$\frac{x}{8}+\frac{x}{6} =7\\\frac{3x+4x}{24} =\frac{168}{24} \\3x+4x=168\\7x=168\\x=\frac{168}{7}\\x=24$

11)$\frac{x+2}{4}+\frac{x+3}{5} =2\\\frac{5*(x+2)+4*(x+3)}{20}=\frac{40}{20} \\5*(x+2)+4*(x+3)=40\\5x+10+4x+12=40\\5x+4x=40-10-12\\9x=18\\x=\frac{18}{9} \\x=2$