Answer:
Your answer is
From the equation : y=x+1
slope is 1 y intercept is 1
(x,y)= ( 1,2),(3,4)...........................(Infinity -1,Infinity)
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You combine like terms.
-2x+9x
whatever answer that is you then combine the like terms -9+-1 the you just make an expression out of them.
The HL theorem is a special case of the SSS postulate.