99,999,999 + (-4) is basically 99,999,999 - 4
99,999,999 - 4 = 99,999,995
6 - x/10 = -3
6 = -3 + x/10
9 = x/10
90 = x
Here are my answers to the given questions above:
Part 1. Here is my example of a real life scenario that describes what is happening. Let us say, I have 2 cookies and the bottle of milk costs 11 dollars, and 3 cookies and 4 bottles of milk cost 24 dollars.
Part 2.
y=11-2x
3x+4(11-2x)=24
3x+44-8x=24
-5x=-20
x=4
y=11-8
y=3
Therefore, each cookie costs 4 dollars, and a bottle of milk costs 3 dollars.
Hope this answer helps. Let me know if you need more help next time.
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You would be expected to pay 3,130.00 (3,125.14) Euros.
The second one is the only equivalent equation. Simply plug in each variable in each equation. And compare!
