Question

2x + 10 = 40
x + (x + 1) = 11
x/2 + 2x = x + 30

Answer 1

Respuesta:

x = 15

x = 5

x = 20

Explicación:

2x + 10 = 40

2x = 40 - 10

2x = 30

x = 30 / 2

x = 15

x + (x + 1) = 11

x + x +1 = 11

2x = 11 - 1

2x = 10

x = 10 / 2

x = 5

x/2 + 2x = x + 30

x/2 + 2x - x = 30

(x + 4x - 2x)/2 = 30

(3x) / 2 = 30

3x = 60

x = 60 / 3

x = 20