Rezolva prin metoda reducerii urmatoarele sisteme de ecuatii:
a){2x+3y=5+2y
a){4x+2y=7+x

b){3(x-1)+y=-5
b) {2x+2(y+1)=6

c){3(x+2)+2y=y-5
c) {2x+2(y-6)=3x-6

d){3x-2(x+y)=6
d) {2(x-y)+4y=0

e){4(x-2)+5y=10
e){5(x+3)-2y=54

f){3(x-4)+1=4y
f){4(x+2)+2y=-14