Abiologist is comparing the growth of a population of flies per week to the number of flies a lizard will consume per week. she has devised an equation to solve for which day (x) the lizard would be able to eat the entire population. the equation is 3x = 5x - 1. however, she has observed that the lizard cannot eat more than seven flies in one week.

explain to the biologist how she can solve this on a graph using a system of equations. identify any possible constraints to the situation.