Question

Resolva as proporções a baixo:

a) -2x/5 = 3/4

b) 2(a+5)/5 = a+1/4

c) v+5/4 = 3/5

Answer 1

a) - 2x/5 = 3/4

- 2x * 4 = 5 * 3

- 8x = 15  *(-1)

8x = - 15

x = - 15/8

b) 2(a + 5)/5 = a + 1/4

2a + 10 / 5 = a + 1 / 4

2a + 10 * (4) = 5 * (a + 1)

8a + 40 = 5a + 5

8a - 5a = 5 - 40

3a = - 35

a = - 35/3

c) x + 5 / 4 = 3/5

3 * (x +5) = 4 * 3

3x + 15 = 12

3x = 12 - 15

3x = - 3

x = - 3/3

x = - 1