Solve linear equation -x + 4 = -2x

my attempt: -x + 4 - 4 = -2x - 4
-x = -6x

i think i missed a step or something..

any would be appreciated

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The price of a dozen eggs was $1.63. suppose the price increases m dollars per dozen and then the price decreases $0.12 per dozen. which expression represents the current price of eggs after the two price changes?

Find the distance between (7,-6) and (-3,-9)

Atriangle has verticals at b(-3,0), c(2,-1), d(-1,2). which transformation would produce an image with verticals b”(-2,1), c”(3,2), d”(0,-1)?