[tex] \large \boxed{(k + k)(4) = k(4) + k(4)}[/tex]
First, we find the value of k(4). We can find the value of k(4) by substituting x = 4 in k(x).
[tex] \large{k(x) = 5x - 6 \longrightarrow k(4) = 5(4) - 6} \\ \large{k(4) = 20 - 6 \longrightarrow 14}[/tex]
Therefore the value of k(4) is 14. Next we find k(4)+k(4) which is equivalent to 14+14. Hence, the value of (k+k)(4) is 28. There's also another method.
[tex] \large \boxed{(k + k)(4) = 2k(4)}[/tex]
As we know k(4) is 14. Therefore 2k(4) is 2×14 = 28.
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