<PRE><B>Question 1136542</B>
.


Substitute a= 12 and b= 7 into the expression


    3*7 - 2*12 - 9


and calculate it on your own.



Right NOW &amp;nbsp;!&amp;nbsp;!&amp;nbsp;!&amp;nbsp;! &amp;nbsp;&amp;nbsp;&amp;nbsp;&amp;nbsp;3/11/19



Happy calculations !



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