<span>4x + 3y = 16
7x + 6y = 31
Note what happens if we mult. the first eqn. by -2:
-8x - 6y = -32
Combining this with the 2nd equation eliminates the variable y:
</span>-8x - 6y = -32<span>
7x + 6y = 31
--------------------
-x = -1, or x = 1. Sub 1 for x in either of the 2 given eqns to find y:
For example: 4(1) + 3y = 16, so 36 = 12, and y = 3. Sol'n is (1,3).</span>
10 time the value of the digits to the right.
Answer:
$70.59
Step-by-step explanation:
- 15% of $83.05 = 12.4575
- $83.05 - $12.4575 = $70.59
I hope this helps!
Okay so in this question it says to solve f(7). This means to plug in the 7 every where you see an x, so that it looks like this:
Then you'll solve it like a normal equation.
Hope this helped! Let me know if there is anything I need to clarify or explain more in depth!