Respuesta :
Answer:
She ordered 4 toppings.
Step-by-step explanation:
7.5+1.35x=12.90
1.35x=12.9-7.5
1.35x=5.4
x=5.4/1.35
x=4
answer: 4
1) subtract 7.50 from 12.90. $5.40
2) divide 5.40 by 1.35. 4 toppings
1) subtract 7.50 from 12.90. $5.40
2) divide 5.40 by 1.35. 4 toppings