Question

Решите уравнение
1. 8x = -8.8
2. 9t - 13 -4t = 17
3. 14 + 5x = 0
4. 5x - 3x = 22 + 14x
5. 7 - (x + 6) = 4
6. 0.8(x - 5) - 13 = 2x + 5

Answer 1

$1) 8x=-8,8$
$x= -frac{8,8}{8}$
$x=-1,1$
$2) 9t-13-4t=17$
$5t-13=17$
$5t=17+13$
$5t=30$
$t=6$
$3) 14+5x=0$
$5x=-14$
$x= frac{-14}{5}$
$x=-2,8$
$4) 5x-3x=22+14x$
$2x=14x+22$
$-12x=22$
$x= frac{22}{-12}$
$x=-1 frac{5}{6}$
$5) 7-(x+6)=4$
$1-x=4$
$-x=3$
$x=-3$
$6) 0,8(x-5)-13=2x+5$
$0,8x-4-13=2x+5$
$0,8x-17=2x+5$
$-1,2x-17=5$
$-1,2=5+17$
$-1,2x=22$
$x= frac{22}{-1,2}$
x≈-18