1)
3(x-2)=x+2
3x-6=x+2
3x-x=2+6
2x=8
x=8:2
x=4
====
2)
5-2(x-1)=4-x
5-2x+2=4-x
-2x+x=4-5-2
-x=-3
x=3
=====
3)
(7x+1)-(9x+3)=5
7x+1-9x-3=5
7x-9x=5-1+3
-2x=7
x=7:(-2)
x=-3,5
====
4)
3,4+2y=7(y-2,3)
3,4+2y=7y-16,1
2y-7y=-16,1-3,4
-5y=-19,5
y=19,5:5
y=3,9
----
5)
0,2(7-2y)=2,3-0,3(y-6)
1,4-0,4y=2,3-0,3y+1,8
-0,4y+0,3y=2,3+1,8-1,4
-0,1y=2,7
y=2,7:(-0,1)
y=-27
====
6)
2/3(1/3x-1/2)=4x+2 1/2
2/9x-1/3=4x+2 1/2
2/9x-4x=2 1/2+1/3
-3 7/9x=2 5/6
x=17/6:(-34/9)
x=17/6*(-9/34)
x=-3/4