Question

me responde porfavor 4 equaçoes 10x=15+9x 20=-6x+32 17x+40=21x 8x-14=2x

Answer 1

a)
10x = 15 + 9x
10x - 9x = 15
x = 15

b)
20 = - 6x + 32
20 - 32 = - 6x
- 12 = - 6x (-1)
12 = 6x
6x = 12
x = 12/6
x = 2

c)
17x + 40 = 21x
40 = 21x - 17x
40 = 4x
4x = 40
x = 40/4
x = 10

d)
8x - 14 = 2x
8x - 2x = 14
6x = 14
x = 14 (:2)
      6   (:2)
x = 7/3