Question

dada a função f(x)=-2x+3 calcule.
f(x)=-5

Answer 1

$f(x) = -2x+3 \\ \\ f(x) = -5 \\ \\ -5=-2x+3 \\ \\ 2x=3+5 \\ \\ 2x=8 \\ \\ x= \frac{8}{2} \\ \\ x=4$

Answer 2

f(x)=-2x+3
f(x)=-5
-2x+3=-5
-2x=-5-3
-2x=-8.(-1)
2x=8
x=8/2
x=4