<span>(6, 4, 4, 5, 1, 8, 10, 7, 8, 6, 6, 7, 5, 4, 6) </span>now arrange them <span>1,</span>4, 4,4,5, 5,6,6,6,6,7,7,8,8,10 we have 15 numbers median is 8th number :second 6 first<span> quarterly is the last 4 third </span><span>quarterly is the second 7</span>
So, what is the substitution? Y of course, this is because y is equal to 3x + 14.
2x - 3 (3x + 14) = -14
Multiply 3 with the numbers in the parentheses.
2x - 9x + 42 = -14
So you maybe be wondering why it is a negative 7 instead of subtracting 9 with 2. Using PEMDAS, we always read from left to right. So it is basically 2 -9 and you get -7.
-7x + 42 = -14
Then subtract 42 from both sides.
-7x + 42 - 42 = -14 - 42
Simplify
-7x = -56
Divide 7 by both sides.
-7x / 7 = -56 / 7
x = -8
And you might ask, why we get x instead afterwards. This is because both -7 and 7 cancel each other out leaving us with x.
