Proszę o dokończenie rozwiązywania tego układu równań
{ (2x-y)/4 + (3x+5)/2=3
{ (x-7)/5 - (2y+x)/10=-1
{ (2x-y)/4 + (3x+5)/2=3 / *4
{ (x-7)/5 - (2y+x)/10=-1 /*10
{ 4(2x-y)/4 + 4(3x+5)/2=12
{ 10(x-7)/5 - 10(2y+x)/10=-10
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(2x-y)/4 + (3x+5)/2=3 /*4
(x-7)/5 - (2y+x)/10=-1 /*10
2x-y+6x+10=12
2x-14-2y-x=-10
8x-y=12-10
x-2y=-10+14
8x-y=2
x-2y=4
8x-y=2
x=4+2y
8*(4+2y)-y=2
32+16y-y=2
15y=-30 /:15
y=-2
x=4+2*(-2)
x=4+(-4)
x=0
y=-2
x=0