Question

-5(7-x)=6(x+2); 5(0,3+6)-4(0,2x-7)= -5; 0,5(3x-4)+4,4=0,9(4x-2)

Answer 1

Ответ:

$- 35 + 5x = 6x + 12 \\ 5x - 6x = 12 + 35 \\ - x = 47 \\ x = - 47 \\ 1.5 + 30 - 0.8x + 27 = - 5 \\ - 0.8x = - 5 - 1.5 - 30 \\ - 0.8x = - 30 \\ x = - 30 \div 0.8 \\ x = - 37.5$

$1.5x - 2 + 4.4 = 3.6 x- 1.8 \\1.5x - 3.6x = - 1.8 + 2 - 4.4 \\ - 1.1x = - 4.2 \\ - x = - 4.2 \div 1.1 \\ x = - 3.81$