Question

ME AJUDEM,EU PRECISO MUITO!

OBRIGADA!​

Answer 1

Nestes itens devemos tirar o o mmc dos denominadores para só depois calcular as igualdades:

f)$1+2x = \frac{x}{3} - \frac{x}{2}  \\1+ 2x = \frac{2x - 3x}{6} \\1 + 2x = -\frac{x}{\\6}\\ 1 = -2x - \frac{x}{6}\\ 1 = \frac{-12x -x}{6} \\1 = -\frac{13x}{6}\\ 13x = -6\\x = -\frac{6}{13}$

g)$\frac{x}{3}+\frac{x}{2} = 15\\\frac{2x + 3x}{6} = 15\\ \frac{5x}{6} = 15\\ 5x = 90\\x =\frac{90}{15}\\ x = 6$

h)$\frac{x}{2}-\frac{x}{4} = \frac{1}{2} \\\frac{2x-x}{4}=\frac{1}{2} \\ \frac{x}{4} = \frac{1}{2} \\  2x = 4\\x = \frac{4}{2}\\ x = 2$

i)$\frac{x}{5} +\frac{x}{2} = \frac{7}{10}\\\frac{2x+5x}{10}  =\frac{7}{10} \\2x + 5x = 7\\7x = 7\\x = \frac{7}{7} \\x = 1$

j)$\frac{x}{2} +\frac{x}{3} = 1\\\frac{3x+2x}{6}=1\\\frac{5x}{6}=1\\ 5x = 6\\x=\frac{6}{5}$