а)4x-6y-3x+5y
б)7y-9y+2x+2y
в)y-2x-y+x
г)0,3y-0,1x-0,9x+0,7y
-10-2(2x-7)
-2(4+3x)+8x
28x-5(6x-0,2)
4x+(8-6x)
-13x-(4-9x)
2(6+7)-(12x+11)
8x-(19x-6)+4(3x-1)
-5(2x-1)-3(3-5x)
б)7y-9y+2x+2y
в)y-2x-y+x
г)0,3y-0,1x-0,9x+0,7y
-10-2(2x-7)
-2(4+3x)+8x
28x-5(6x-0,2)
4x+(8-6x)
-13x-(4-9x)
2(6+7)-(12x+11)
8x-(19x-6)+4(3x-1)
-5(2x-1)-3(3-5x)
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Answers & Comments
б) 7y-9y+2x+2y=-2y+2y+2x=2x
в)y-2x-y+x=y-y-2x+x=-3x
г)0,3y-0,1x-0,9x+0,7y=0,3y+0,7y-0,9x-0,1x=y-0,8x