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y+9 = (6/5)*(x-7) // - (6/5)*(x-7)
y-((6/5)*(x-7))+9 = 0
(-6/5)*(x-7)+y+9 = 0
y-6/5*(x-7)+9 = 0
y-6/5*(x-7)+9 = 0
y-6/5*x+42/5+9 = 0
y-6/5*x+87/5 = 0
y-6/5*x+87/5 = 0
y-6/5*x+87/5 = 0 // - y+87/5
-6/5*x = -(y+87/5) // : -6/5
x = (-(y+87/5))/(-6/5)
x = 5/6*(y+87/5)
x = 5/6*(y+87/5)
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