Question

Помогите решить А)2(c-3)-3(4-c)=5. Б) 7+4(3-x)=5(x+2).
В) 3(0,4a+3)-0,6a=3.

Answer 1

Ответ:

A)

$2c - 6 - 12 + 3c = 5 \ 5c - 18 = 5 \ 5c = 23 \ c = frac{23}{5} = 4 frac{3}{5} = 4.6$

Б)

$7 + 12 - 4x = 5x + 10 \ 19 - 4x - 5x - 10 = 0 \ - 9x + 9 = 0 \ - 9x = - 9 \ x = - 9 div ( - 9)$

$x = 1$

В)

$1.2a + 9 - 0.6a = 3 \ 0.6a + 9 = 3 \ 0.6x =3 - 9 \ 0.6x = - 6 \ x = - 6 div 0.6 = - 60 div 6$

$x = - 10$