Question

Реши уравнение:
−20−1,8y=39,4+3,6y.

ответ: y=

Answer 1

$- 3.6y - 1.8y = 39.4 + 20 \\ - 5.4y = 59.4 \\ y = 59.4 \div ( - 5.4) \\ y = - 11$

Answer 2

$-20-1,8y=39,4+3,6y$

$-1,8y-3,6y=20+39,4$

$-5,4y=59,4$

        $y=59,4:(-5,4)$

        $y=-11$