substitution or addition/elimination technique to solve system of equations
Not what you're looking for?
Use substitution or addition/elimination technique to solve system of equations.
Show steps of solution. please apply apply both techniques.
here it is...
2x + y = 6
x - y = -3
Purchase this Solution
Solution Summary
This posting offers help with using substitution or addition/elimination technique to solve a system of equations.
Solution Preview
Substitution:
1) Solve one of the equations for one of the variables. Say, solve the first equation for y:
y=6-2x
2) Substitute this expression for y into the other equation:
x - (6-2x) = -3
The equation becomes an equation in one variable only. Solve it for that vaiable:
x - 6 + 2x = -3
3x - 6 = -3
3x = -3+6
3x = 3
x = 1
3) Substitute the value that you found into ...
Purchase this Solution
Free BrainMass Quizzes
Probability Quiz
Some questions on probability
Know Your Linear Equations
Each question is a choice-summary multiple choice question that will present you with a linear equation and then make 4 statements about that equation. You must determine which of the 4 statements are true (if any) in regards to the equation.
Exponential Expressions
In this quiz, you will have a chance to practice basic terminology of exponential expressions and how to evaluate them.
Multiplying Complex Numbers
This is a short quiz to check your understanding of multiplication of complex numbers in rectangular form.
Graphs and Functions
This quiz helps you easily identify a function and test your understanding of ranges, domains , function inverses and transformations.