Answer:
Let's write and solve an equation to find the value of g, representing the number of visitors to Grand Canyon National Park in 2021.
We are given that the total number of visitors to all National Parks in 2021 was 297 million.
This is 18 times the sum of 12 million and g (the number of visitors to Grand Canyon National Park).The equation can be written as:
297 million = 18 * (12 million + g)To solve for g, we'll divide both sides of the equation by 18:
(297 million) / 18 = 12 million + g16.5 million = 12 million + gNext, we'll subtract 12 million from both sides of the equation:
16.5 million - 12 million = g4.5 million = gTherefore, the value of g, representing the number of visitors to Grand Canyon National Park in 2021, is 4.5 million.