Question

b) -1 + 2x = 9 - 3x d) 2x = 20 - 3x son ecuaciones

Answer 1

Explicación paso a paso:

b) 2x + 3x = 9 + 1

5x = 10

x = 10 : 2

x = 5

d) 2x + 3x = 20

5x = 20

x = 20 : 5

x = 4