Respuesta :
Answer:
D. 17
Step-by-step explanation:
2(17)+5 = 39
3(17) +10 = 61
39 + 61 = 100
D.17 is the answer
2x + 5 + 3x + 10 = 100
5x + 15 = 100
-15 -15
5x = 85
————
5 5
X= 17
2x + 5 + 3x + 10 = 100
5x + 15 = 100
-15 -15
5x = 85
————
5 5
X= 17