Question

Помогите решить плиз срочнооооо!!!

Answer 1

1)
a)
9x-7=6x+14
9x-6x=14+7
3x=21
x=21/3
x=7
б)
3*(4-2x+6)=-2x+4
12-6x+18=-2x+4
-6x+2x=4-12-18
-4x=-26
x=-26/(-4)
x=6.5
в)
5/8*(x-2)-2/3*(x+2)=-1
5/8x-5/4-2/3x-4/3=-1
15/24x-16/24x-5/4-4/3=-1
-1/24x-15/12-16/12=-1
-1/24x-31/12=-1
-1/24x=-12/12+31/12
-1/24x=19/12
x=19/12*(-24/1)
x=-456/12
x=-38
2)
x+y=14
x-y=2
y=x-2
x+x-2=14
2x=14+2
2x=16
x=16/2
x=8
y=8-2
y=6
3)
x=3y
(x-3)/(y+3)=2
(3y-3)/(y+3)=2
3y-3=2*(y+3)
3y-3=2y+6
3y-2y=6+3
y=9
x=3*9=27