Respuesta :
Answer:
9. x = 16
10. x = 18
Step-by-step explanation:
9. 2x + 9 + 3x + 1 = 90
5x + 10 = 90
5x + 80
x = 16
10. 90 - 53 = 47
2x + 11 = 47
2x = 36
x = 18
Answer:
9. x = 16
10. x = 18
Step-by-step explanation:
9. 2x + 9 + 3x + 1 = 90
5x + 10 = 90
5x + 80
x = 16
10. 90 - 53 = 47
2x + 11 = 47
2x = 36
x = 18