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12x-33=-22x+1
34x=34
x=1
2)
0,4x+0,7=-0,1 /·10
4x+7=-1
4x=-8
x= -2
3)
x-24=6x-9
-24=5x-9
-15=5x
x= -3
4)
3x-2(4,5-4x)+1=x-2(1-5x)-6
3x-9+8x+1=x-2+10x-6
11x-8=11x-8
5)
-3(x-5)=2,5(8-4x)
-3x+15=20-10x
7x+15=20
7x=5
x=5/7
6)
4(x-1)=6(1+x)
4x-4=6+6x
-10=2x
x= -5
7)
5x-1=0,5(6x-8)
5x-1=3x-4
2x=-3
x= -1,5
8)
2(3-x)-4(x-5)=2x+2
6-2x-4x+20=2x+2
-6x+26=2x+2
26=8x+2
24=8x
x=3
9)
0,2(10-5x)=3+2(x-1)
1/5(10-5x)=3+2x-2
2-x=1+2x
2=1+3x
1=3x
x=1/3
10)
37=(20-4x):2-7x
37=10-2x-7x
37=10-9x
27=-9x
x= -3
11)
0,8(2x-1)+0,3(4-5x)=0
16/10x-8/10+12/10-15/10x=0
1/10x+4/10=0
1/10x=-4/10
x= -4
12)
2(x+2)=4(0,5x-8)
2x+4=2x-32
4≠ -32 nie ma rozwiązania
13)
1/2-3x=2/3x+5 /·6
3-18x=4x+30
3=22x+30
27=22x
x=27/22
14)
3/8x+2=1/8+1/4x /·8
3x+16=1+2x
x+16=1
x= -15