Question

A bag contains two steel balls and five brass balls. The total weight of the bag is 13 pounds. If two steel balls are added and two brass balls are removed, the bag’s weight decreases to 12 pounds.
If s is the weight of a steel ball and b is the weight of a brass ball, the system of linear equations representing this situation is . _____
Solving the system of linear equations, the weight of a steel ball is ____ , and the weight of a brass ball is ____ .

Answer 1

The equation is 2s+5b=13 and 4s+3b=12, For some reason when I find s & b they aren't the right numbers for their weight. I come up with fractions.. Weird ones.

Answer 2

@dan815

Answer 3

Try solving to get decimal answers.

Answer 4

Lol, i just noticed i seriously suck at math xD

Answer 5

No one sucks, Just got to learn

Answer 6

I just saw the thing and I have a headache now no joke.

Answer 7

You have the right equations, but one of the answers should be a whole number, and the other should have a decimal.

Answer 8

2s+5b=13 and 4s+3b=12,
these are right

Answer 9

s=3b/4+3
2(3b/4 +3)+5b=13
b=14/13

Answer 10

So lets multiply the top by -2 and add them both
-2( 2s+5b=13)
-4s -10b=-26 now add to this bottom equation
4s+3b=12,
-----------------
-7b=-14
b=2

Answer 11

Where did you get the -2

Answer 12

i multiplied the whole set by -2

Answer 13

we are allowed to multiple both sides of an equality by the same number it wont change anything

Answer 14

if
x=2
then
2x=4 is still true

Answer 15

2s+5b=13
if this is true then
-2( 2s+5b)=-2(13)

Answer 16

.75

Answer 17

this is the method, they were showing you in the previous question

Answer 18

1.5 I mean...

Answer 19

Thanks (:

Answer 20

yes s=1.5
and b=2

Answer 21

=]

Answer 22

Dont we all wish we could be geniuses