Question

Решите уравнение: 1: -2(5x-2)-(3x+4)=-(8x-1)+2(6x+10) 2: 4x-(-5x)+10-(-2)=-(-4)+x 3: -2x+4x-(-8)-5=-5x-11+(-3)

Answer 1

1) 2(5х-2)-(3х+4)=(8х-1)+2(6х+10)
10х-4-3х+4=8х-1+12х+20
10х-3х-8х-12х=-1+20+4-4
-13х=19
х= 19:(-13)
х= -1 6/13

2) 4х-(-5х)+10-(-2)=-(-4)+х
4х+5х+10+2=4+х
4х+5х-х=4-10-2
8х= -8
х= -8:8
х= -1

3) -2+4х-(-8)-5=-5х-11+(-3)
-2х+4х+8-5= -5х-11-3
-2х+4х+5х= -11-3+5-8
7х= -17
х= -17:7
х= - 2 3/7