domjuan1456
17.03.2020 •
Mathematics
What is the unknown factor that makes each of the following statements true?
5-х = ? (х-5)
b-k= ? (k-b)
– 3х +7 = ? (3х – 7)
A. -1/2
B. 1
C. -2
D.-1
Solved
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Ответ:
-1 case D)
Step-by-step explanation:
5-x=-(x-5) so the unknown factor is -1
b-k=-(k-b), again, -1
Similar for third case.
Ответ:
x+1 is the tens digit, so the tens digit is 4 and the number is 43.