Prosze rozwiazac ten układ równan :
dam dodatkowo naj za wyjaśnienie ;))
10y+20+3x-15=x-5
25y+50+3x-15=-10
10y+3x+5=x-5
25y+3x+35=-10
10y+20+2x=-5
2x=-10y-25 |:2
x=-5y-12,5
25y+3(-5y-12,5)+35=-10
25y-15y-37,5+35=-10
10y-2,5=-10
10y=-7,5|:10
y=-3/4
x=-5*(-3/4)-12,5
x=4 i 3/4 -12 i 1/2
x=-8 i 1/4
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10y+20+3x-15=x-5
25y+50+3x-15=-10
10y+3x+5=x-5
25y+3x+35=-10
10y+20+2x=-5
25y+3x+35=-10
2x=-10y-25 |:2
25y+3x+35=-10
x=-5y-12,5
25y+3(-5y-12,5)+35=-10
x=-5y-12,5
25y-15y-37,5+35=-10
x=-5y-12,5
10y-2,5=-10
x=-5y-12,5
10y=-7,5|:10
x=-5y-12,5
y=-3/4
x=-5*(-3/4)-12,5
y=-3/4
x=4 i 3/4 -12 i 1/2
y=-3/4
x=-8 i 1/4
y=-3/4