Answer:
21
Step-by-step explanation:
This is the answer because:
1) To begin with, we can do the distributive property by doing 7(3)= 21 and 7(4) = 28. Once we do this, we know that 7(3+4) = 49 because 21+28 is 49.
2) After this we also know that if 7(4) equals 28, then 49-28 is 21 and 7(3) is also 21.
Therefore, the answer is 21.
Hope this helps!
