Answered

Which of the equation has a solution of 9.

A. W-12=21
B. R- 1 = 10
C. A + 3 = 12
D. M + 9 = 81

Answer :

C has a solution of 9 you subtract 3 to get A=9
well C because
a+3=12
    -3    -3 
a= 9

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