Rozwiąż układ równań:
10(y+2) + x - 5 = x - 5
15(y+2) + 3(x-5) = -10
10y+20+x-5=x-5
15y+30+3x-15= -10
10y+x-x= -5+5-20
15y+3x= -10+15-30
10y= -20 /10
15y+3x= -25
y= -2
15*(-2)+3x= -25
-30+3x = - 25
3x= -25+30
3x= 5 /3
x= 5/3
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10(y+2) + x - 5 = x - 5
15(y+2) + 3(x-5) = -10
10y+20+x-5=x-5
15y+30+3x-15= -10
10y+x-x= -5+5-20
15y+3x= -10+15-30
10y= -20 /10
15y+3x= -25
y= -2
15*(-2)+3x= -25
-30+3x = - 25
3x= -25+30
3x= 5 /3
x= 5/3