What is the value of $x$ in $g(x)=-97.2x-83.2$ when $g(x)=-38$ ?

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Answer 1 · 2016-10-20T09:34:10

When we have the value of the function and want to know the value of the variable, simply raise equality and solve the resulting equation.

If $g (x)=-97.2 x-83.2$ and we know that $g(x)=-38$ , it's obvious that $-38=-97.2 x-83.2$ .

We obtain a first degree simple equation, very easy to solve:

$-38=-97.2x-83.2 rArr 97.2 x=-83.2+38 rArr$

$rArr 97.2x=-45.2 rArr x=-45.2/97.2 =- 113/243 ~~ - 0,465...$

What is the value of xx in g(x)=-97.2x-83.2g(x)=-97.2x-83.2 when g(x)=-38g(x)=-38?