12. which equation is an identity?
A. 7 - (9x + 3) = - 9x - 4
B. 6m - 5 = 7m + 5 - m
C. 10p + 6 - p = 12p - 3 (p - 2)
D. 3y + 2 = 3y - 2
13. which equation has no solution
A. 5y + 3 = 5v - 5
B. 2x - 4 = 2x + 7 - x
C. 2y + 5 - y = 2y - 3 (y - 6)
D. 7z + 9 = - 7z - 6
14. solve the following equation 2 (h-8) - h = h - 16
A. h =
B. h =
C. infinitely many solutions
D. no solution
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