Question

решите уравнение
2(x+1) + 1/2 (x-1)=7/4 x

Answer 1

2х+2+1/2х-1/2=7/4х
5/2х+3/2=7/4х
тогда
10/4х+6/4=7/4х
3/4х+6/4=0
тогда х = -2
Ответ: -2

Answer 2

2(x+1) +1/2 (x-1) = 7/4x 
8(x+1) + 2 (x-1) = 7x
8x+8+2x-2 = 7x
3x = -6
х = (-6):3
x = -2

проверка
2(-2+1) + 1/2 (-2-1) = 7/4 *-2
-2 + (-1,5) = -14/4
-3,5 = -3,5