Question

a) 2x/3 + 16/3 = - 4x/2
b) 3x/2 + 2x/3 = - 1+ 3x/ 2
c) 2x + 1 - 7x + 1 = -2x + 1 + 7x
d) 3. (2 - x) = 3 - 2x

Answer 1

Resposta:

$a)~\frac{2x}{3} +\frac{16}{3} =-\frac{4x}{2} \\ \\ mmc=6\\ \\ \frac{4x+32=-12x}{6} \\ \\ 4x+32=-12x\\ \\ 4x+12x=-32\\ \\ 16x=-32\\ \\ x=-\frac{32}{16} \\ \\ x=-2$

$b)~\frac{3x}{2} +\frac{2x}{3} =-1+\frac{3x}{2} \\ \\ mmc=6\\ \\ \frac{9x+4x=-6+9x}{6} \\ \\ 9x+4x=-6+9x\\ \\ 9x+4x-9x=-6\\ \\ 4x=-6\\ \\ x=-\frac{6}{4} =-\frac{3}{2} ~~ou~~-1,5$

$c)~2x+1-7x+1=-2x+1+7x\\ \\ 2x-7x+2x-7x=1-1+1\\ \\ -10x=1\\ \\ x=\frac{1}{-10} \\ \\ x=-\frac{1}{10} ~~ou~~-0,1$

$d)~3.(2-x)=3-2x\\ \\ 6-3x=3-2x\\ \\ -3x+2x=3-6\\ \\ -x=-3~.(-1)\\ \\ x=3$