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-5x-5=5
-5x=5+5
-5x=10
x=-2
b)
1/2x+4=-6
1/2x=-6-4
1/2x=-10
x=-20
c)
0,6-3/4x= -1/3
-3/4x=-1/3-0,6
-3/4x=-14/15
x=1¹¹/₄₅
d)
3x-4=5x+2
3x-5x=2+4
-2x=6
x=-3
e)
7-2x=7x-2
-2x-7x=-2-7
-9x=-9
x=1
f)
2/3(6x-9=12
4x-6=12
4x=12+6
4x=18
x=4,5
g)
1/10(25x - 40) + 2 = 3/4(8x+12)-9
2,5x-4+2=6x+9-9
2,5x-6x=9-9+4-2
-3,5x=2
x=-0,8