Question

1)х:(-0,9)=-4
2)х:1/9=-6
3)(-7)×(х+1,4)=0
4)3,9×(5-х)=0
5)-5,1×(2х+7)=0
6)7/12×(3-х)=0
Решите пожалуйста уравнения!!!
Помогите.!

Answer 1

$1) : : x div ( - 0.9) = - 4 \ x = - 4 times ( - 0.9) \ x = 3.6 \ 2) : : x div frac{1}{9 } = - 6 \ x = - 6 times frac{1}{9} = - frac{6}{9} = - frac{2}{3} \ x = - frac{2}{3}$
$3) : : - 7 times (x + 1.4) = 0 \ x + 1.4 = 0 \ x = - 1.4 \ 4) : : 3.9 times (5 - x) = 0 \ 5 - x = 0 \ - x = - 5 \ x = 5$
$5) : : : - 5.1 times (2x + 7) = 0 \ 2x + 7 = 0 \ 2x = - 7 \ x = - frac{7}{2} \ x = - 3 frac{1}{2} = - 3.5$
$6) : : : frac{7}{12} times (3 - x) = 0 \ 3 - x = 0 \ - x = - 3 \ x = 3$