the output of a function is 10 more than 4 times the input. find the input when the output is -26
Mathematics · Middle School · Sun Jan 24 2021
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Given:
The output of a function is 10 more than 4 times the input.
Find the input when the output is -26
Solution:
Let x = input
4x + 10 = output
Equate 26 to the solution for the output, then solve for the input.
4x + 10 = -26
Transpose 10 to the other side of the equation, hence it must be taken to note that in transposing a number, the sign changes.
4x = -26 - 10
4x = -36
Divide both sides by 4 in order to determine the value of x.
4x/4 = -36/4
x = -9
Final answer:
Input = -9