Question

find the solution to the system of equations by the addition method.

x-3y = -25
8x - 3y = -74

Answer 1

Want my solution?

Answer 2

yea

Answer 3

I would rather you understand how to do it.

Answer 4

All you have to do is simply

1. isolate y,
2. set y = y,
3. solve for x
4. solve for y

Answer 5

whats a easy method? sry i just got surgery and my brain isn't working as well as i want it too. im doing some homework

Answer 6

That IS the easy method. All you have to do is just realize it and try to understand it.

Answer 7

If it wasn't the easy method, I wouldn't be wasting my time showing you.

Answer 8

thank u i appreciate it

Answer 9

If you just isolate y, you could actually plug that into the calculator and find the intersecting point.

Answer 10

When you solve for y, it will have the form y = mx+b, but I usually solve these algebraically, and to check myself, I can used calc if I choose.

Answer 11

i wish my school taught me how to use this calculator right. math is so frusterating

Answer 12

i really appreciate ur help tho

Answer 13

0. Original Problem:
x-3y = -25
8x - 3y = -74

1. Isolate y:
y = (25 + x)/3
y = (74 + 8x)/3

y = y

25 + x = 74 + 8x
25 - 74 = 8x - x
-49 = 7x
-49/7 = x
-7 = x
6 = y

Answer 14

Do you see where y is isolated?

y = (25 + x)/3
y = (74 + 8x)/3

^^^^^^^^

You can use your calc to input those two expressions and it will give you the intersection point.