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aili
@aili
July 2022
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1)решите уравнение 7х + 5(2х + 1) = 5х + 15 2)вычислить ( 5,4* (- 3 целых 1/3) + 13,8 ) : 1 целую 11/15 - 5 целых 5/6 3) // х / + 3 / = 5 решить уравнение
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1401Tamara
1) 7х + 5(2х + 1) = 5х + 15
7х + 10х + 5 = 5х + 15
12х = 10
х = 10/12 = 5/6
2) ( 5,4*(- 3 1/3) + 13,8 ) : 1 11/15 - 5 5/6 = -8 25/78
5,4*(-3 1/3) = 5,4*(-10/3) = - 1,8*10= - 18
-18 + 13,8 = -4,2
- 4,2 : 1 11/15 = - 4 2/10 : 26/15 = - 4 1/5 :26/15 = -21/5*15/26= - 63/26 = = - 2 11/26
- 2 11/26 - 5 5/6 = - 2 33/78 - 5 70/78 = - 7 103/78 = -8 25/78
3) // х / + 3 / = 5 решить уравнение
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Answers & Comments
7х + 10х + 5 = 5х + 15
12х = 10
х = 10/12 = 5/6
2) ( 5,4*(- 3 1/3) + 13,8 ) : 1 11/15 - 5 5/6 = -8 25/78
5,4*(-3 1/3) = 5,4*(-10/3) = - 1,8*10= - 18
-18 + 13,8 = -4,2
- 4,2 : 1 11/15 = - 4 2/10 : 26/15 = - 4 1/5 :26/15 = -21/5*15/26= - 63/26 = = - 2 11/26
- 2 11/26 - 5 5/6 = - 2 33/78 - 5 70/78 = - 7 103/78 = -8 25/78
3) // х / + 3 / = 5 решить уравнение