PLEASE HELP ASAP PLZ also plz don’t answer if ur gonna put down random things

THIS IS MY 5TH ATTEMP PLZ NO BOTS

How is working backward similar to solving an equation?

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

Type the correct answer in the box. consider the system of linear equations below. rewrite one of the two equations above in the form ax + by = c, where a, b, and c are constants, so that the sum of the new equation and the unchanged equation from the original system results in an equation in one variable.