<span>6x – 7y = 16
2x + 7y = 24
This system is easily solvable by the elimination method as the y-terms are opposites of each other. You may add the two equations together and they will cancel out.
</span> 6x – 7y = 16
2x + 7y = 24
+___________
8x – 0 = 40
8x = 40
x = 5
Substitute 5 for x into either of the above equation and solve algebraically for y.
2x + 7y = 24
2(5) + 7y = 24
10 + 7y = 24
7y = 14
y = 2
Check work by plugging both x- and y-values into each original equation.
6x – 7y = 16 => 6(5) – 7(2) = 16 => 30 – 14 = 16
2x + 7y = 24 => 2(5) + 7(2) = 24 => 10 + 14 = 24
Answer:
x = 5; y = 2
(5, 2)
it equals an answer that answers the question
$6 ? 5+4 =9
9-3 =6
I don't know if this is correct but this is how I would do it
Answer:
Leaving as a radical form
Why?
Because that's the whole value if you convert it to a decimal you cannot write all the numbers, and in the radical form it has all the numbers
It would be useful when we are working with equations for example the quadratic equation, if you get that x=√5, you would want the exact value. And there are more useful
2/1 = (8x-2)/9
2=(8x-2)/9
18=8x-2
20=8x
x=8/20
x=2/5