<PRE><B>Question 130090</B>
12A-5B=18 NOW SUBTRACT THE SECOND EQUATION
-15A+5B=-30
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-3A=-12
A=-12/-3
A=4 ANSWER.
12*4-5B=18
48-5B=18
-5B=18-48
-5B=-30
B=-30/-5
B=6 ANSWER.
PROOF:
15*4-5*6=30
60-30=30
30=30</PRE>