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a fost răspuns

Calculati:
2a+5a-3a=?
a+5a-7a=?
x+2x+3x+4x-10x=?
b+2b-3b+5b-6b+b
y-2y-3y-5y+9y=?
a+2b-a-b=?
x+5y-6y-x=?
2x+6z+2z-x=?
2a+b+a-2b=?
7a+15-a+2=?
b+1+a+3+2b=?
5a-7b+a+2=?
2a+c-b+3b=?
14a-10a-c+2c=?
a+b+c-2b-3c=?
Macar cateva sa fie rezolvate daca nu toate! Va rog ajutati-ma!

Răspuns :

Maryanabel3579
2a+5a-3a=2a+2a=4a________________ a+5a-7a=6a-7a=-a__________________ x+2x+3x+4x-10x=3x+3x+4x-10x=6x+4x-10x=10x-10x=0____________________ b+2b-3b+5b-6b+b=3b-3b+5b+b-6b=0+6b-6b=0_____________________________ y-2y-3y-5y+9y=-y-3y-5y+9y=-4y-5y+9y=-9y+9y=0____________________ a+2b-a-b=a-a+2b-b=0+b=b___________ x+5y-6y-x=x-x+5y-6y=0-y=-y__________ 2x+6z+2z-x=x+8z___________________ 2a+b+a-2b=3a-b____________________