3x+4y=1 and x-2y=6 is called a 2-by-2, please explain......
2007-08-01 00:41:20 · 4 answers · asked by rainwater 3 in Science & Mathematics ➔ Mathematics
Possibly means 2 equations and 2 unknowns , the important thing is to be able to solve the equations.
3x + 4y = 1
2x - 4y = 12------ADD
5x = 13
x = 13 / 5
39/5 + 4y = 1
4y = - 34/5
y = - 34 / 20
y = - 17 / 10
x = 13 / 5 , y = - 17 / 10
2007-08-04 22:38:03 · answer #1 · answered by Como 7 · 0⤊ 0⤋
2 equations with 2 variables ... to solve a 2 variable problem, you need at least 2 equations
2007-08-01 00:47:36 · answer #2 · answered by Luay14 6 · 0⤊ 1⤋
Two equations, two unknowns (x & y).
http://www.msu.edu/~osstutor/44_s_1825.htm
http://www.analyzemath.com/Tutorial-System-Equations/Tutorial-System-Equations.html
Anybody else who's ignorant want to give me a thumbs-down for the correct answer?
2007-08-01 00:43:42 · answer #3 · answered by Anonymous · 2⤊ 1⤋
it is just an expression in your group
it means two equations of two variables each
2007-08-01 00:48:30 · answer #4 · answered by CPUcate 6 · 0⤊ 2⤋