<PRE><B>Question 704731</B>
X=5y+5
X=-2y+10 SUBTRACT
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0=5Y+2Y+5-10
7Y=5
Y=5/7 ANS.
X=5(5/7)+5
X=25/7+5
X=25/7+35/7
X=60/7 ANS.
PROOF:
60/7=-2(5/7)+10
60/7=-10/7+70/7
60/7=60/7</PRE>