Question

alguem me ajuda por favor ?
a) 3.(x + 3) = 17 + x



b) - 2.(x + 1) = 8



c) 4.(2x + 2) = 5x - 4



d) 2.(3 - x) = 9 + x



e) 5.(1 - x) = 20



f) -2.(x + 4) = 6 – 4x

Answer 1

✔OLÁ!!!

$a)3.(x + 3) = 17 + x \\ 3x + 9 = 17 + x \\ 3x - x = 17 - 9 \\ 2x = 8 \\ x = \frac{8}{2} \\ x = 4$

$b) - 2.(x + 1) = 8 \\ - 2x - 2 = 8 \\ - 2x = 8 + 2 \\ - 2x = 10( - 1) \\ 2x = - 10 \\ x = - \frac{10}{2} \\ x = - 5$

$c)4.(2x + 2) = 5x - 4 \\ 8x + 8 = 5x - 4 \\ 8x - 5x = - 4 - 8 \\ 3x = - 12 \\ x = - \frac{12}{3} \\ x = - 4$

$d)2.(3 - x) = 9 + x \\ 6 - 2x = 9 + x \\ - 2x - x = 9 - 6 \\ - 3x = 3( - 1) \\ 3x = - 3 \\ x = - \frac{3}{3} \\ x = - 1$

$e)5.(1 - x) = 20 \\ 5 - 5x = 20 \\ - 5x = 20 - 5 \\ - 5x = 15( - 1) \\ 5x = - 15 \\ x = - \frac{15}{5} \\ x = - 3$

$f) - 2.(x + 4) = 6 - 4x \\ - 2x - 8 = 6 - 4x \\ - 2x + 4x = 6 + 8 \\ 2x = 14 \\ x = \frac{14}{2} \\ x = 7$