Posted by Anonymous on Wednesday, January 19, 2011 at 7:53pm.
How would u figure this question out?
Does this system of linear equation have a solution of (-3,4)?
2x-3 = 6
y = 3x-13
Do u just substitute the numbers or something?
MATH ALGEBRA - Reiny, Wednesday, January 19, 2011 at 8:04pm
Yes, just substitute in both equations
Left Side = 2x-3 = 2(-3) - 3 = -9
but RS = 6, so the values don't even work in the first equation, you can stop here
(-3,4) is NOT a solution
I have a feeling that your first equation should have been
2x - 3y = 6
in that case:
LS - 2(-3) - 3(4) = -6
RS = +6
No point even trying the second
So no good either.
MATH ALGEBRA - Anonymous, Wednesday, January 19, 2011 at 8:06pm
Yes, sorry Reiny I had forgotton the Y. And thanks for the explanation:)
Answer This Question
More Related Questions
- Grade 10 Math - Write an equation that forms a system of equations with x + y = ...
- Algebra 1 - What is an equation of a line perpendicular to the line with ...
- Algebra - Show equation AX=B represents a linear system of two equations in two ...
- Algebra ?? - What would be the missing piece of information given the following ...
- math - ahhhhhh...i cant seem to figure out how you graph an equation(linear) a ...
- algebra - solve the system by graphing x+y=4 y=2x+1 I think these are the kind ...
- drwls, is this correct,math - drawls this is from the previous post is this ...
- algebra - How do I do substitution equations out of the equations in the system...
- math - Given the equation - 3x +2y =4. Write another linear equation that will ...
- math 20 system of equations - I have been solving system of equations ...