Help please

Solve by plugging in $0$ for $y$

$3(0)=-4x+24$

$0=-4x+24$

Add $4x$ to both sides.

$4x=24$

Divide both sides by $4$.

$x=6$

Hence, the x-coordinate of the x-intercept is $6$.

(The x-intercept itself is $(6,0)$).