How can x + 8 = −x + 7 be set up as a system of equations?

Astore has clearance items that have been marked down by 60%. they are having a sale, advertising an additional 55% off clearance items. what percent of the original price do you end up paying?

Write a fraction less than 1, which has a denominator of 6 and is greater than 3/4 plz answer !

In need of in the diagram, ∠abc is a right angle. ∠dbc = 30°27'40". find the measure of ∠abd.