Question

2(0,2x-3)-8(0,7x-4)=39

Answer 1

Ответ:

$x = - 2.5$

Объяснение:

$2(0.2x - 3) - 8(0.7x - 4) = 39 \\ 0.4x - 6 - 5.6x + 32 = 39 \\ - 5.2x + 26 = 39 \\ - 5.2x = 39 - 26 \\ - 5.2x = 13 \\ x = 13 \div ( - 5.2) \\ x = - 2.5$