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10(y+2)+3(x-5)=x-5
25(y+2)+3(x-5)=-10
10y + 20 + 3x - 15 = x - 5
25y + 50 + 3x - 15 = -10
10y + 2x = -5 - 20 + 15
25y + 3x = -10 - 50 + 15
10y + 2x = -10 / × ( -3 )
25y + 3x = -45 / × 2
-30y - 6x = 30
50y + 6x = -90
+ _________________
20y = -60 / 20
y = -3
y= -3
-30 × (-3) - 6x = 30
y= -3
-90 - 6x = 30
y = -3
-6x = 30 + 90
y = -3
-6x = 120 / (-6)
y = -3
x = 20