SOLUTION: 57.5x + 114y =6270 21.9x +92y= 3910 What is x and y

Algebra ->  Equations -> SOLUTION: 57.5x + 114y =6270 21.9x +92y= 3910 What is x and y       Log On


   

Question 1123703: 57.5x + 114y =6270
21.9x +92y= 3910
What is x and y
Answer by josgarithmetic(39617) About Me  (Show Source):
You can put this solution on YOUR website!
Use substitution method! Do computations for the variables, AFTER starting final formula of each. (or actually, you can do some computations any time you feel like).

92y=3910-21.0x
y=%283910-21.9x%29%2F92
-
substituting
57.5x%2B114%28%283910-21.9x%29%2F92%29=6270
92%2A57.5x%2B114%283910-21.9x%29=92%2A6270
92%2A57.5x%2B114%2A3910-114%2A21.9x=92%2A6270
%2892%2A57.5-114%2A21.9%29x%2B114%2A3910=92%2A6270
%2892%2A57.5-114%2A21.9%29x=92%2A6270-114%2A3910
2793.4x=131100
x=131100%2F2793.4
highlight%28x=46.9320541276%29

.
.continuefindingy.
Use this one for evaluating y:
y=%283910-21.9x%29%2F92


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You probably want to round your found x and y, AFTER you compute them, to three significant figures - AFTER you first calculate them in the solving process.