Răspuns:
a) 4x-2y+6x-12=-6
6x-4y+4-5y=-8
10x-2y=6
6x-9y=-12
x = 6+2y/10
36+12y/10-9y=-12
36+12y-90y=-120
-78y=-156 rezulta y = 156/78=2
x = 1
b) 3x-y-2=-2x-4y
4x+8=6-3y+3
5x+3y=2
4x+3y=1
3y=2-5x
4x+2-5x=1 rezulta -x=-1 rezulta x = 1 iar y = -1
c) xradical2-3y+3=-1
2xradical2-radical2=2y-x
x=3y-4/radical2
6yradical2-4radical2-2radical2=4y-3yradical2-4radical2
9yradical2-4y=2radical2
y = 2radical2/(9radical2-4)
x= 3radical2/(9-2radical2)
Explicație pas cu pas:
