Answer:
x=10
Step-by-step explanation:
9×10=90 That is how I got the answer.
Her answer is wrong because the product of 78.112 = 8736.
Answer:
99
Step-by-step explanation:
You subtract 45 and 36 from 180
You can "add" like you say or you could just call it subtracting. If you subtract 5 from 5 you still get zero. Then on the right side, you would do the same. You would subtract 5 from 12 getting x, which is 7.
If you added you would still get the same answers but it is easier to say just subtract. Anything you do to the left, do to the right.
Hope this helps :)
