solve for the system of equations: 0.423y + x - 45 - 150 = 0; & 7.5x - 3.17y + 1125 = 0?

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solve for the system of equations: 0.423y + x - 45 - 150 = 0; & 7.5x - 3.17y + 1125 = 0?

solve for x and solve y, look for double sets

2006-10-12 17:01:39 · 3 answers · asked by honest abe 4 in Science & Mathematics ➔ Mathematics

3 answers

second answer's right:

if you solve for x in the first equation, you get:

x = -.423y + 195

plug that into the second equation:

7.5 (-.423Y +195) - 3.17 y +1125 = 0

will give you

y = 407.9622

and finally plugging y into either equation will give you

x = 22.4320

2006-10-12 17:28:23 · answer #1 · answered by ? 1 · 0⤊ 0⤋

Gaussian elimination applied to the system

x + 0.423y = 195
7.5x - 3.17y = -1125

gives you

x = 22.4320, y = 407.9622

2006-10-13 00:17:12 · answer #2 · answered by James L 5 · 0⤊ 0⤋

x= -56910
y= -135000

2006-10-13 00:15:09 · answer #3 · answered by Mixedbrunette 3 · 0⤊ 0⤋