(2x-25)-(2x-9)=4x-8
2x-2x-4x=-8+25+9
-4x=24 /:-4
x=-6
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(2x-25)-(2x-9)=4x-8
2x-2x-4x=-8+25+9
-4x=24 /:-4
x=-6
x²-10x+25-x²+6x-9=4x-8
-4x+16=4x-8
-8x=-24/:(-8)
x=3