Answer:

Step-by-step explanation:


15x+10x=12x+90; ⇔ 13x=90;

Answer:
10
Step-by-step explanation:
Since 75 sandwiches have salad this means that 75 - 30 = 45 of them have tuna with salad. Therefore, the amount of sandwiches that have cheese without salad is 100 - (30 + 15 + 45) = 100 - 90 = 10.
Answer:
A
Step-by-step explanation: