Question

Find the value of x such that f(x)=12

Answer 1

What the equation?

Answer 2

\[f(x)=-\frac{ 1 }{ 5 }x+2\]

Answer 3

So, we know f(x)= 12, then we can say 12= -1/5x + 2.

Move the 2 over:
10 = -1/5x

negate both sides:

-10 = 1/5x

Then multiply both sides by 5

-50 = 5/5x = x

so:
x=-50

Make sense?

Answer 4

3*4