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-2x+1=4
-2x=4-1
-2x=3/ -2
x=-3/2
b ) -(4+x)=2(3-x)
-4-x=6-x
-x+x=6-4 =2
c ) 0,25x+0,4=0,35
0,25x=0,35-0,4
0,25x=-0,05
x=-0,2
d ) -(6+x)=2(8-x)
-6-x=16-2x
-x+2x=16+6
x=22
x=1
b)-4-x=6-2x
-x-2x=6+4
-3x=10:(-3)
x=-3,3
c)0,25x=0,35-0,4
0,25x=-0,05:(0,25)
x=-0,2
d)-6-6x=16-2x
-6x+2x=16+6
-4x=22:(4)
x=5,5