Решите уравнение: в) 3/7a + 2/5 = 1 и) 2/5z + 2/3z - 7/15z = 2 1/2. Created by yukityan. matematika-ru

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Решите уравнение:
в) 3/7a + 2/5 = 1

и) 2/5z + 2/3z - 7/15z = 2 1/2

Answers & Comments

THeBeSTBoY В) 3/7а + 2/5=1
3/7а=1-2/5=3/5
а=3/5:3/7
а=7/5=1,4
и) 2/5z + 2/3z - 7/15z = 2 1/2
6/15z + 10/15z - 7/15z = 2 1/2
9/15z=5/2
z=5/2:9/15
z=4 1/6

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