Question

me ayudan con esto porfavor

Answer 1

Explicación paso a paso:

a. x - 20 = 7

x = 20 + 7

x = 27

b. 3x = x + 10

2x = 10

x = 10 / 2

x = 5

c. 2x + 9 = 5

2x = 5 - 9

2x = -4

x = -2