Given:
3a + 15 + bc - 6
a=7 b=3 c=15
First, you would have to substitute in the numbers for your variables:
3a + 15 + bc - 6
3(7) + 15 + (3)(15) - 6
Next, you want to simplify:
3(7) + 15 + (3)(15) - 6
21 + 15 + 45 - 6
Now, you would want you would want to combine everything together from left to right:
21 + 15 + 45 - 6
36 + 45 - 6
81 - 6
75
Answer: 75
I hope this helps!
