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3(x-5y)=5-9y
3x - 3y + 4x = 8
3x - 15y = 5 - 9y
7x = 8 +3y
3x - 15y + 9y = 5
7x = 8 +3y
-6y + 3x = 5
3y = 7x - 8
-2(7x - 8) + 3x = 5
-14x + 16 + 3x = 5
-11x = -11 |:(-11)
x = 1
3y = 7x - 8
3y = 7*1 - 8
3y = 7-8
3y = -1 |:3
y = -⅓