Ill give brainliest solve this problem using the elimination method. x + y = 21 2x + 3y = 47

x = 16, y = 5

Step-by-step explanation:

Let's eliminate a variable first. In this case, I multiplied the first equation by -2 so that I could get rid of x and solve for y. This is how it looks like:

-2x - 2y = -42

2x + 3y = 47

Combine both these equations and you get y = 5, so you solved for y already!

Now you have to solve for x. Let's use your first equation to do that.

x + y = 21

x + 5 = 21

x = 16

Hope this helps!

341

step-by-step explanation:

all you have to do is 9x31 (which equals 279) and then 20x31 (which equals 620). then you have to subtract. 620-279=341.