Answer:
Step-by-step explanation:
10 - m = m - 10 is one solution
7x + 5 = 7(x + 5) is no solution
3(t + 2) = (2 + 3t) + 4 is identity
hope this helps!
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A
Jang wang ching chang hshahhsb
is a factor of a polynomial, then 
is a root of this polynomial.