Question

ПОДРОБНО РЕШИТЕ УРАВНЕНИЯ

Answer 1

1)

1,2 (x - 3) + 0,4 (1 - x) = 4

1,2x - 3,6 + 0,4 - 0,4x = 4

0,8x = 7,2

x = 7,2 : 0,8

x = 9

2)

$\frac{2-3x}{4} + \frac{1-x}{2} = \frac{4-3x}{8}\\\frac{(2-3x)*2}{4*2} + \frac{(1-x)*4}{2*4} = \frac{4-3x}{8}\\\frac{4-6x}{8} + \frac{4-4x}{8} = \frac{4-3x}{8}\\\frac{-10x+8}{8} - \frac{4-3x}{8} =0\\\frac{-10x+8 - 4 + 3x}{8} = 0\\\frac{-7x+4}{8} = 0\\-7x + 4 = 0\\-7x = -4\\x = \frac{-4}{-7}\\x = \frac{4}{7}$