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-5x-2x=-10-8
-7x=-18//:(-7)
x=2 4/7
-5x-2x=-8-10
-7x=-18
x=18/7= 2 i 4/7
pozdrawiam:)
-7x+10=(-8) |-10
(-7x)=(-18) |/(-7)
x=2 4/7