Can someone please help me

A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month. :
x = 0.8x + 72

How many people who became members of the site that month were between 30 and 40 years of age?

112
288
360
432

Question

Can someone please help me

A social networking site recorded that 80% of the people who became members of the site one month were between 30 and 40 years old. The equation below represents this information, where x represents the total number of people who became members of the site that month. :
x = 0.8x + 72

How many people who became members of the site that month were between 30 and 40 years of age? 

 	
	112
	288
	360
	432

amistre64 · Answer

how do we use algebra to solve for a variable?

amistre64 · Answer

gather all your x terms to one side, factor out the x, and divide off the excess