Question

A função y=-3x + 15 intersecta o eixo x em qual valor?

Answer 1

$\large\boxed{\begin{array}{l}\sf y=-3x+15\\\sf Se~a~func_{\!\!,}\tilde ao~intersecta~o~eixo~x,ent\tilde ao~y=0.\\\sf ou~seja,\\\sf -3x+15=0\\\sf 3x=15\\\sf x=\dfrac{15}{3}\\\sf x=5\end{array}}$