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4*2+8=16
-6x+2y+7+4x-5y-3= -2x-3y+4
2*(-0,5)-3* 0,1+4= -1-0,3+4= 2,7
-6x+2y+7+4x-5y-3= -2x + -3y +4 = 1 + -0,3 = 0,7
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