Solve equation by the addition method

X+3y=15,-8x+3y=-12

What is the answer for this problem? -6.6 - (-7.27)

John brought a jacket for $5 less than half its original price. If he paid $50 for the jacket, what was the original price? Show work.

I one day 18 people withdrew $100 from an ATM machine. What is the overall change in the amount of money in the ATM machine?

Simplificar este polinómio: (5x-3) ²-4x²-3x

If I have had to learn 76 Bible verses and I learned 4 a day how long will it take to learn 76

239250 divided by 7656

What is the volume of a cylinder with a base radius of 4 and height 7?

Math quest after a winter storm, the depth of the snow on cherry street was 10 / text{ cm}10 cm10, space, c, m.

Which value is the solution for this equation? (6h - 9) = 6

In Aunt Melly's attics there are also spiders and ants, the total of 136 legs and 20 heads. If a spider has 8 legs and an ant has 6 legs, how many spiders and how many ants are there?