18 18 18 next check the solution in equation 2 2x 5y

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2Practice for the Final Exam: Chapter 4 Review-Barone Morales1 of 14/1/2016 2:36 AM
Student: Barone MoralesDate: 4/1/16Instructor: Carl LetscheCourse: MATH110 D012 Win 16Assignment: Practice for the FinalExam: Chapter 4 ReviewPractice for the Final Exam: Chapter 4 Review-Barone Morales1 of 34/1/2016 2:36 AM
Find the solution to the system by the addition (elimination) method. Check your answers.
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Practice for the Final Exam: Chapter 4 Review-Barone Morales2 of 34/1/2016 2:36 AM
Thus, the solution is verified, since it satisfies both of the original equations.2,12Practice for the Final Exam: Chapter 4 Review-Barone Morales3 of 34/1/2016 2:36 AM
Student: Barone MoralesDate: 4/1/16Instructor: Carl LetscheCourse: MATH110 D012 Win 16Assignment: Practice for the FinalExam: Chapter 4 ReviewIf possible, solve the system of equations. Use any method. If there is not a unique solution to the system, state a reason.6x −y =30(1)7x + 4y =66(2)We can use any method to solve this system. Notice that we can eliminate the variable y by multiplying the first equation by so, let's use the addition method.4,Multiply each side of equation (1) by and simplify.44(6x) − (4)(y) = 4(30)24x − 4y = 120(3)Now add equations (2) and (3).24x −4y =120(3)7x +4y =66(2)_____________31x=186Add (3) and (2).The resulting equation contains just the variable x; the variable y has been eliminated. Solve the above equation for x.

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