Question

if hayden and uri have 1250, and hayden and willow have 830, and uri has 4 times more than willow. how much does hayden have​

Answer 1

690

Explanation:

Let

hayden have "h"

uri have "u"

and

willow have "w"

Hayden & Uri have 1250. we can write:

h + u = 1250

Hayden & Willow have 830, so we can write:

h + w = 830

Uri has 4 times than Willow, so we can write:

u = 4w

Putting 3rd equation in first, we get:

h + u = 1250

h + 4w = 1250

Now, we take 2nd and 4th equation, which are:

h + w = 830

h + 4w = 1250

Multiplying this first one with -1, gives us:

-1 * [h+w=830] = -h - w = -830

Now we add this up with 4th equation. Shown below:

- h - w = - 830

h + 4w = 1250

----------------------

4w - w = 1250 - 830

3w = 420

w = 420/3

w = 140

We know u = 4w, so u = 4 * 140 = 560

u = 560

Also, we know h + w = 830, so

h + 140 = 830

h = 830 - 140

h = 690

Thus Hayden has 690