Ответ:
1.
1) -14 + 8 = 6
2) 7,23 + (-18,4) = 11,17
3)-5/6 + 7/8 = -15/16 + 14/16 = -1/16
4)-9,4 + 9,4 = 0
2.
1)|x| - 16 = -7. 2)2x - 9,21 = -4,3
|x| = -7 + 16. 2x = -4,3 + 9,21
|x| = 9. 2x = 4,91
x = 9. x = 2,455
3.
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Answers & Comments
Ответ:
1.
1) -14 + 8 = 6
2) 7,23 + (-18,4) = 11,17
3)-5/6 + 7/8 = -15/16 + 14/16 = -1/16
4)-9,4 + 9,4 = 0
2.
1)|x| - 16 = -7. 2)2x - 9,21 = -4,3
|x| = -7 + 16. 2x = -4,3 + 9,21
|x| = 9. 2x = 4,91
x = 9. x = 2,455
3.