keem3247
03.07.2019 •
Mathematics
Twice the difference of a number and 4 is equal to three times the sum of the number and 7. find the number.
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Ответ:
2x - 8 = 3x + 21
-21 - 8 = 3x - 2x
-29 = x <==
Ответ:
Step-by-step explanation:
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