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4(5x+1)-3(y-3)=36
8x+12-8y+2 =30 /:2
20x+13 - 3y = 36
4x+7-4y = 15
20x-3y = 23
4x = 8+4y /:4
20x-3y = 23
x = 2+y
20(2+y) - 3y =23
x = 2+y
40+20y - 3y = 23
x = 2+y
17y = -17
x = 2+y
y = -17/17 = -1
x = 1
y = -1