Explicație pas cu pas:
4(x-2)+5y=10
5(x+3)-2y=54
4x-8+5y=10
5x+15-2y=54
4x+5y=18/*2
5x-2y=39/*5
8x+10y=36
25x-10y=195
8x+25x=36+195
33x=231
x=231:33
x=7
4x+5y=18
4*7+5y=18
28+5y=18
5y=18-28
5y=-10
y=-2
23)
x/2=y/3
x+1/4=y+1/7
3x-2y=0
28x+7=28y+4
3x-2y=0
28x-28y=4-7
3x-2y=0/*(-14)
28x-28y=-3
-42x+28y=-14
28x-28y=-3
-14x=-17*(-1)
14x=17
x=17/14
3*17/14+2y=0
51/14+2y=0
51+14y=0
14y=-51
y=-51/14
Mie asa mi-a dat. Sper ca ai inteles
