The equation is written in standard form. What is the first step when writing an equivalent equation which solves for y?
Add 7x to both sides of the equation.
Subtract 7x from both sides of the equation.
Add 30 to both sides of the equation.
Subtract 30 from both sides of the equation

Me n o w. i need t h i s. 10 points

Set $r$ is a set of rectangles such that (1) only the grid points shown here are used as vertices, (2) all sides are vertical or horizontal and (3) no two rectangles in the set are congruent. if $r$ contains the maximum possible number of rectangles given these conditions, what fraction of the rectangles in set $r$ are squares? express your answer as a common fraction.

Talia took the bus from her home to the bank and then walked back to her home along the same route. the bus traveled at an average speed of 40 km/h and she walked at an average speed of 5 km/h. to determine the time, x, that it took talia to walk home, she used the equation 40(0.9 – x) = 5x. the time of trip 2 is hours. the distance of trip 1 is km.