Question

ME AJUDEM, POR FAVOR, URGENTEEEEEEEEE!!!

Resolva as seguintes proporções.

a) $\frac{x}{5}= \frac{21}{35}$

b)$\frac{10}{7}= \frac{50}{x}$

c) $\frac{1}{7}= \frac{x-6}{49}$

d)$\frac{5x+3}{10}= \frac{-21}{30}$

e)$\frac{0,9}{x}= \frac{-18}{27}$

Answer 1

a) x/5 = 21/35
x = 5 . 21/35
x = 21/7
x = 3
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b) 10/7 = 50/x
x . 10/7 = 50
x = 50/(10/7)
x = 50 . 7/10
x = 5 . 7
x = 35
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c) 1/7 = x-6/49
x-6 = 49 . (1/7)
x-6 = 7 . 1
x - 6 = 7
x = 7 + 6
x = 13
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d) 5x + 3/10 = - 21/30
5x + 3 = 10 . (-21/30)
5x + 3 = - 21/3
5x + 3 = - 7
5x = - 7 - 3
5x = -10
x = -10/5
x = - 2
__________________
e)0,9/x = - 18/27
27 . 0,9 = x . - 18
- 18x = 27 . 0,9
x = 27 . 0,9/- 18
x = 24,3/-18
x = -1,35