The value of x if f(x) = 15 is -3
Linear function
A linear function is a function that has a leading degree of 1. Given the expression;
f(x) = −3x + 6
Substitute the given f(x) into the function to have:
15 = −3x + 6,
Collect the like terms
3x = 6 - 15
3x = -9
Divide both sides by 3
3x/3 = -9/3
x = -3
Hence the value of x if f(x) = 15 is -3
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