
To find : the solution to the given system of equation using substitution method

Answer to Problem 7E
The solution to the system of equation is
Explanation of Solution
Given information : The system of equation is
Concept Involved:
Solution of a system of equation is the point which makes both the equation TRUE.
Graphically the solution to the system of equation is the point where the two lines meet.
Method of Substitution:
1. Solve one of the equations for one variable in terms of the other.
2. Substitute the expression found in Step 1 into the other equation to obtain anequation in one variable.
3. Solve the equation obtained in Step 2.
4. Back-substitute the value obtained in Step 3 into the expression obtained inStep 1 to find the value of the other variable.
5. Check that the solution satisfies each of the original equations.
Calculation:
Description | Steps |
Label the given equation | |
Solve the 2nd equation for variable | |
Substitute x for y in the 1st equation | |
Combine like terms in left side of the equation | |
Dividing 3 on both sides | |
Simplify fraction on both sides of the equation | |
Substitute 2 for x in the equation |
Conclusion:
The solution to the given system of equation is
Chapter 7 Solutions
Precalculus with Limits
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