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dchikalova
@dchikalova
July 2022
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ПЛИИИЗ!! УМОЛЯЮ!!
буду очень благодарна, я не успеваю сделать
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iramazurk
1.
1) 1/6 + 1 3/4 = 2/12 + 1 9/12 = 1 11/12
2) 2 7/8 : 1 11/12 = 23/8 * 12/23 = 12/8 = 1 4/8 = 1 1/2
3) 0,5 - 1 1/2 = 5/10 - 3/2 = = 1/2 - 3/2 = -2/2 = -1
2.
2х - 6 - 1 = 5х + 15 - 0,4
2х - 5х = 15 - 0,4 + 6 + 1
-3х = 21,6
х = 21,6 : (-3)
х = - 7,2
3.
-5 * 0,3 - 7 = -1,5 - 7 = - 8,5
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Answers & Comments
1) 1/6 + 1 3/4 = 2/12 + 1 9/12 = 1 11/12
2) 2 7/8 : 1 11/12 = 23/8 * 12/23 = 12/8 = 1 4/8 = 1 1/2
3) 0,5 - 1 1/2 = 5/10 - 3/2 = = 1/2 - 3/2 = -2/2 = -1
2.
2х - 6 - 1 = 5х + 15 - 0,4
2х - 5х = 15 - 0,4 + 6 + 1
-3х = 21,6
х = 21,6 : (-3)
х = - 7,2
3.
-5 * 0,3 - 7 = -1,5 - 7 = - 8,5