Question

Зробідь будьласка 2 і 3 завдання!!!!!

Answer 1

Ответ:

2

m=x

$3(2.7x - 2) - 3.9 - 5(1.4 + 0.2x) = 3( \frac{27 \times - 23}{10 \times 6} - 2) - 3.9 - 5(1.4 + \frac{2 \times - 23}{10 \times 6} ) = 3( \frac{23 \times - 9}{20} - 2) - 3.9 - 5(1.4 - \frac{23}{30} ) = 3( - 10.35 - 2) - 3.9 - 5(1.4 - 0.77) = 3 \times - 12.35 - 3.9 - 3.15 = - 44.1$

3

$5.2(2 - 1.5x) + 3(1.4x - 4) = 5.1x - 10.3$

$10.4 - 7.8x + 4.2x - 12 = 5.1x - 10.3$

$8.7x = - 8.7$

$x = 1$