8(3a+6)=2a-4 how do you do this problem i keep getting a number with an insane amount of decimals

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18

Which term describes the point where the perpendicular bisectors of the three sides of a triangle intersect?

The poll report includes a table titled, “americans using cash now versus five years ago, by age.” the age intervals are not equal. why do you think the gallup organization chose the age intervals of 23–34, 35–54, and 55+ to display these results?