Question

Dada as funções de 1 grau f (x) = 8x + 2k e g (x) = -4x+12. Calcule k sabendo que f (10) + f (16) =4y

Answer 1

$f(x)=8x+2k \\ \\ Valor~~de~~k~~sabendo \\ \\ f(10)+f(16)=4 \\ \\ 8(10)+2k+8.(16)+2k=4 \\ 80+2k+128+2k=4 \\ 208+4k=4 \\ 4k=4-208 \\ 4k=-204 \\ k=(-204)\div(4) \\ \\ k=-51$