Question

Determine o valor da incógnita nas equações a seguir:
a) 7x + 3 = 20
b) 5x + 2 = 3x + 5
c) 8x – 10 = 0
d) 13y = 0
e) 10 y + (8/2) = (7/2)

Answer 1

Olá,

a) 7x + 3= 20

7x= 17

x= 17/7

b) 5x + 2= 3x + 5

2x= 5 - 2

2x= 3

x= 3/2

c) 8x - 10= 0

8x= 10

x= 10/8 ou 5/4

d) 13y= 0

y= 0

e) 10y + (8/2)= (7/2)

10y= 7/2 - 8/2

10y= 7 - 8/2

20y= -1

y= -1/20