Question

1) -0,4(3х-1)+8(0,8х-0,3)=5-(3,8х+4)

2) 0,9х-0,6(х-3)=2(0,2х-1,3)

ПАЖАЛУСТА ПОМОЖІТЬ

Answer 1

Ответ:

1)

$x = \frac{1}{3}$

2)

$x = 44$

Объяснение:

1)

$- 0.4(3x - 1) + 8(0.8x - \\ - 0.3) = \\ = 5 - (3.8x + 4)$

Розкриемо дужки та зведемо подiбнi додатки:

$- 1.2x + 0.4 + 6.4x - \\ - 2.4 = \\ = 5 - 3.8x - 4$

$- 1.2x + 6.4x + 3.8x = \\ = 5 - 4 - 0.4 + 2.4$

$9x = 3$

$x = 3 \div 9$

$x = \frac{1}{3}$

2)

$0.9x - 0.6(x - 3) = \\ = 2(0.2x - 1.3)$

$0.9x - 0.6x + 1.8 = \\ = 0.4x - 2.6$

$0.9x - 0.6x - 0.4x = \\ = - 2.6 - 1.8$

$- 0.1x = - 4.4$

$0.1x = 4.4$

$x = 4.4 \div 0.1$

$x = 44$