Решите: -8+7(-Х-2)=6 7-2Х=37-7(х+3) -3Х+1-3(х+3)=-2(1-х)+2

Question

Решите:
-8+7(-Х-2)=6
7-2Х=37-7(х+3)
-3Х+1-3(х+3)=-2(1-х)+2

Answer 1

1) -8+7(-x-2)=6
-8-7x-14=6
-7x=6+8+14
-7x=28
x=28/(-7)
x=-4
2) 7-2x=37-7(x+3)
7-2x=37-7x-21
-2x+7x=37-21-7
5x=9
x=9/5
x=1,8
3) -3x+1-3(x+3)=-2(1-x)+2
-3x+1-3x-9=-2+2x+2
-3x-3x-2x=-2+2-1+9
-8x=8
x=8/(-8)
x=-1

Comments

ПАсибо