Question

Va rog urgend dau coroana !
9. Efectuati : a ) x+3y+4x-2y+x =
b) 4x-x+5y+3x-4y=
c)7a+3b+a-6b+b-2a=
d) 15a+3c-6c+5a+3c-2a=

10.Calculati :
a) (2x-y)+(3x+4y)-x=
b) (7x+2a)-(3a-x)+(-x+a) =
c) (a=2b)-(a-2b)-4b =
d) (15c-14d)+(15d-14c)-(c+d) =

11.Calculati :
a)3a+b+2c-2a+2b-c+a=
b)4x-2a+2x+3b+x+4a+5b=
c) 6a+5m-3n+5m-6a+3n=
d) 12x-3z+4y+2x+z-y+2z-3y=





Sa fie rezolvarea completa va rog !!!!!

Answer 1

c)7a+3b+a-6b+b-2a =  6a  - 2b

c) (a+2b)-(a-2b)-4b = a + 2b - a + 2b - 4b = 0

c) 6a+5m-3n+5m-6a+3n= 10m