Just need a quick answer. My time is running low

Substitute 300 for x in the equation y = 0.14x + 8 to determine the amount for 300 texts in plan A.
[tex]\begin{gathered} y=0.14\cdot300+8 \\ =42.0+8 \\ =50 \end{gathered}[/tex]The cost of 50 texts in plan B is $50, which is equal to cost of 50 texts in plan A. So answer is, the plans cost the same amount.