here a subtraction problem that has been solved correctly for 68-59=9 but the choices is 9+68=77 68+9=77 9+59=68 which one is th
1 answer:
Answer:
9+59=68
Step-by-step explanation:
Each subtraction problem has a dual addition problem that can be used for checking. In general, that dual problem will add the subtrahend back to the difference to get the minuend.
Here we have ...
original problem: 68 -59 = 9
dual problem for checking: 9 +59 = 68
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Answer:
Step-by-step explanation:
To find the inverse, we want to switch the y with x and x with y. Once we do that, we solve for y.
[switch x and y]
[subtract both sides by 3]
[multiply both sides by 2]
Now, we know that .