a)
4+=18
8+x=36
x=36-8
x=28
-6=0,25
-6=
x-48=2
x=2+48
x=50
2,5=-6,5
=-
25=2x-65
-2x=-65-25
-2x=-90
x=45
-3,5=2,5
-=
2x=35+49
2x=84
x=42
-2=3
3x-14=21
3x=21+14
3x=35
x=
b)
2x+7+3x=8+x+11
5x+7=19+x
5x-x=19-7
4x=12
x=3
4x+13+6x+2=13+8x+14
4x+6x+2=8x+14
10x+2=8x+14
10x-8x=14-2
2x=12
x=6
7x+14-3x-8=11x-3-x
4x+6=10x-3
4x-10x=-3-6
-6x=-9
7-3x+8-5x=10+2x-5+5x
15-8x=5+7x
-8x-7x=5-15
-15x=-10
3x+13-x+14,5=41-3x+4,5+x
2x+27,5=45,5=2x
2x+2x=45,5-27,5
4x=18
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a)
4+=18
8+x=36
x=36-8
x=28
-6=0,25
-6=
x-48=2
x=2+48
x=50
2,5=-6,5
=-
25=2x-65
-2x=-65-25
-2x=-90
x=45
-3,5=2,5
-=
2x=35+49
2x=84
x=42
-2=3
3x-14=21
3x=21+14
3x=35
x=
b)
2x+7+3x=8+x+11
5x+7=19+x
5x-x=19-7
4x=12
x=3
4x+13+6x+2=13+8x+14
4x+6x+2=8x+14
10x+2=8x+14
10x-8x=14-2
2x=12
x=6
7x+14-3x-8=11x-3-x
4x+6=10x-3
4x-10x=-3-6
-6x=-9
x=
7-3x+8-5x=10+2x-5+5x
15-8x=5+7x
-8x-7x=5-15
-15x=-10
x=
3x+13-x+14,5=41-3x+4,5+x
2x+27,5=45,5=2x
2x+2x=45,5-27,5
4x=18
x=