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fitch_fan
4x-(2x+3)=7
4x -(2x+3) = 7 4x -2x -3 = 7 2x = 7+3 2x= 10 x = 10/2 x = 5
i dont get 4x -2x -3 = 7 why do you subtract 3
You need multiply all terms for -: -(2x +3 ) = -(+2x) - (+3) = -2x -3 Did you understand?
-(2x+3) is the same thing as -1(2x+3), then multiply -1*2x = -2x, and then multiply -1*(+3) = -3