You add two equations together to eliminate a variable. This particular problem is nice, because it's already setup to eliminate X.
3x - 4y = 9
<span>-3x + 2y = 9
</span>
When we add these two together, 3x - 3x cancels each other out, leaving us with 0x, or nothing.
We continue with -4y + 2y (leaves us with -2y) and 9+9 (18).
-2y = 18
18/-2 = -9.
Now we have y = -9, and we can go back into the problems to solve for x.
<span>3x - 4(-9) = 9
</span>
3x + 36 = 9.
3x = -27
x = -9.
Confirm with the final equation:
-3(-9) + 2(-9) = 9
27 - 18 = 9
9 = 9 --- Confirmed.
The code is 200 because they went under the sea to get the key to work.
Step-by-step explanation:
5.=5.3^2.5^4.x^6=3^2.5^5.x^6
Answer:
5.55
is already rounded to the nearest thousandth.
Step-by-step explanation:
Answer:
Step-by-step explanation:
1. (a) 1/8 = 2/16, (b) 2/3= 5/9 (c) 4/5 = 8/10
2. (a) 1/2 (b) 3/4 (c) 2/3