-2(x-3y)-3(x-y)+(x+3y)-6y= ? x= -1 y= -1/6 (jedna szósta) PILNE !!
-2(x-3y)-3(x-y)+(x+3y)-6y = -2x+6y-3x+3y+x+3y-6y = -4x+3y
-4x+3y=-4*(-1)+3*(-1/6)=4-3/6=4-1/2=3 1/2 (=7/2)
-2(x-3y)-3(x-y)+(x+3y)-6y = -2x + 6y - 3x + 3y + x + 3y - 6y = -2(-1) + 6(- 1/6) - 3(-1) + 3(-1/6) + (-1) + 3(-1/6) - 6(-1/6) = 2 - 6/6 + 3 - 3/6 - 1 - 3/6 + 6/6 = 2 - 1 + 3 - 0,5 - 1 -0,5 + 1 = 3
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-2(x-3y)-3(x-y)+(x+3y)-6y = -2x+6y-3x+3y+x+3y-6y = -4x+3y
-4x+3y=-4*(-1)+3*(-1/6)=4-3/6=4-1/2=3 1/2 (=7/2)
-2(x-3y)-3(x-y)+(x+3y)-6y = -2x + 6y - 3x + 3y + x + 3y - 6y = -2(-1) + 6(- 1/6) - 3(-1) + 3(-1/6) + (-1) + 3(-1/6) - 6(-1/6) = 2 - 6/6 + 3 - 3/6 - 1 - 3/6 + 6/6 = 2 - 1 + 3 - 0,5 - 1 -0,5 + 1 = 3