How many solutions does
0.5x− 3/4 y=7, 5.6− 2/5x=−0.6y
and
5 1/3 x=2y− 1/6, 3y−8x=0.2

have?

will give !

Another type of subtraction equation is 16-b=7. explain how you would sole this equation then solve it.

Donald has x twenty-dollar bills and 11 ten-dollar bill. how much money does donald have? write your answer as an expression.

Arectangular garden is 5 feet long and 3 feet wide. a second rectangular garden has dimensions that are double the dimensions of the first garden. what is the percent of change in perimeter from the first garden to the second garden?