Solve the equation 5x+x-7=4x-2-x

Adam used 1072.4 gallons of water over the course of 7 days. how much water did adam use, on average, each day?

Proving the congruent supplements theorem

Three students each examine the system of linear equations shown. 8x + 4y = 16 8x + 2y = 8 caleb says there is exactly one solution. jeremy says there is no solution. kim says there are infinitely many solutions. which student is correct? provide mathematical reasoning to support your answer. answer in complete sentences. : d