Look at the steps used to solve the equation below . Which mathematical property justifies the work between steps #3 and 4 step#3 10x + 0 =40 +4 step #4 10x =40+4

Country carpets charges $22 per square yard for carpeting, and an additional installation fee of $100. city carpets charges $25 per square yard for the same carpeting, and an additional installation fee of $70

The number of possible solutions of a polynomial can be found by looking

Can someone pls ! pls answer all. no explanation needed..