Respuesta :
4(x + 9) = 20
1. 4 * x = 4x
4 * 9 = 36
2. 4x + 36 = 20
4x + 36-36 = 20 -36
3. 4x = - 16
4x/4 =- 16/4
4. x = - 4
Answer: x = -4
1. 4 * x = 4x
4 * 9 = 36
2. 4x + 36 = 20
4x + 36-36 = 20 -36
3. 4x = - 16
4x/4 =- 16/4
4. x = - 4
Answer: x = -4