Odpowiedź :
Odpowiedź:
3b + ( b+1)= 4b+1
5a - ( a+1)= 4a-1
3 - ( 4x - 6y+2) + ( 2x - 7y)= 3-4x+6y-2+2x-7y=-2x-y+1
( 2a +1) - ( 3a - 2) = 2a+1-3a+2=-a+3=-(-4)+3=7
( 2x + y) + ( x - 5) - ( 6 - 2y)= 2x+y+x-5-6+2y=3x+3y-11=3*3+3*(-2)-11=-8
Odpowiedź:
3b + ( b+1)= 4b+1
5a - ( a+1)= 4a-1
3 - ( 4x - 6y+2) + ( 2x - 7y)= 3-4x+6y-2+2x-7y=-2x-y+1
( 2a +1) - ( 3a - 2) = 2a+1-3a+2=-a+3=-(-4)+3=7
( 2x + y) + ( x - 5) - ( 6 - 2y)= 2x+y+x-5-6+2y=3x+3y-11=3*3+3*(-2)-11=-8