4x-y+ 2z=-1
Given the system -x+2y + 5z = 2, which is true?
|-x+y-3z= 1

X10.1.39question the population of a country has been decreasing for several decades. in 1990, the population was about 145 million people. in 2010, the population was about 138 million people. determine thepercent decrease in the country's population during this time period.elettithe country's population decreased by about% during this time period.