Question

$\: a)x - \frac{8}{15} x = \frac{7}{15}$
$b)x - \frac{7}{9}x = 1 \frac{1}{3}$
$v) \: k - \frac{1}{6} k = 5$
$\: \: g)(7.1c + c) \div 0.3 = 189$
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Answer 1

Ответ:

Пошаговое объяснение:

x - (8/15)x = 7/15

(7/15)x = 7/15

x = 7/15 : 7/15

x = 1

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x - (7/9)x = 1 1/3

(2/9)x = 4/3

x = 4/3 : 2/9

x = 4/3 * 9/2

x = 6

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k - (1/6)k = 5

(5/6)k = 5

k = 5 : 5/6

k = 5 * 6/5

k = 6

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(7,1c + c) : 0,3 = 189

8,1c = 189 * 0,3

8,1c = 56,7

c = 56,7 : 8,1

c = 7

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