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=-1t -4 = -1 razy -3,2 -4 = 3,2 -4 = 0,8
b) -7x+6y+3x-2x+x-3y = dla x= -2 y= 4
=-5x +3 y = 10 + 12 =22
b)-5x+3y=-5*(-2)+3*4=10+12=22
-5x+3y
-5*(-2)+3*4
10+12=22