You can perform all kind of operation that are one the inverse of the other, so that the value won't change. For example, you can multiply and divide by 2:
Or add and subtract 5:
Answer:
The answer would be 2.7. Am not very sure though
Step-by-step explanation:
So what you do is
for example the unkown number is x and the answer you get is y
12-x=y * -15=-140
-140/-15=9.33 (this is y the answer)
12-x=9.3
12-9.3=2.7
To check your answer
12-2.7=9.3
9.3 * -15=-139.5 if you round it then it would be -140
Answer:under is answer
Step-by-step explanation:
5/8+3/4=11/8 then,-2/3-5/6=-3/2
Answer:
168
Step-by-step explanation:
Multiply 21 by 8 so
21 × 8 = 168
