39x7 - 45x7 - 134x7 - 39x7 + 134x7 + 44x7 =
Choose the correct choice from the following
A) -x7
B) x7
C) 2x7
D) 3x7
E) None
Solution:   39x7 - 45x7 - 134x7 - 39x7 + 134x7 + 44x7 =   39x7 - 39x7 - 45x7 + 44x7 - 134x7 + 134x7=   0 - x7 + 0= -x7   -x7nswer -x7
<result>A</result>
39x7 - 45x7 - 134x7 - 39x7 + 134x7 + 44x7 =