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C)-4-x=6-2x; -x+2x=6+4; x=10
d)3-3x(tu chyba miało być"+")1- 2x=9; 3-3x+1-2x=9; x=5
e) 4y+24-y=2y+18; y=-6
f)2x-1-x+3=3; x=1
b) 8,3-x
c) -4-x=6-2x= 10-x
d) 3-x=1-2x=9=5+3x
e) 4y+24-y=2y+18=(-6)-y
f) 2x-1-x+3=3=1-x