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 задачу:

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