This Question: 1 ptSolve the system of equations using the addition methodX 2y 7-x-7y 20O AX- 13 (Simplify your answer,O B. There are infinitely many solutionsc. There is no solution,Select the correct choice below and, if necessary fill in the aA. y 3|(Simplilfy your answerDB. Therere infinitely many solutionsO c. There is no solutionChok to se act and enterOur 31516rsi

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Asked Sep 23, 2019
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Solve using addition method

This Question: 1 pt
Solve the system of equations using the addition method
X 2y 7
-x-7y 20
O A
X- 13 (Simplify your answer,
O B. There are infinitely many solutions
c. There is no solution,
Select the correct choice below and, if necessary fill in the a
A. y 3|(Simplilfy your answer
DB. Therere infinitely many solutions
O c. There is no solution
Chok to se act and enterOur 31516rsi
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This Question: 1 pt Solve the system of equations using the addition method X 2y 7 -x-7y 20 O A X- 13 (Simplify your answer, O B. There are infinitely many solutions c. There is no solution, Select the correct choice below and, if necessary fill in the a A. y 3|(Simplilfy your answer DB. Therere infinitely many solutions O c. There is no solution Chok to se act and enterOur 31516rsi

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Expert Answer

Step 1

The given system of equation are

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x-2y 7 .. -x-7y 20 ) .(1) ...2)

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Step 2

To solve these equations using addition method, adding (1) and (2) gives

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(x-2y)(x7y) = 7 + 20 or, (x-x)(2y7y) = 27 0-9y 27 -9y 27 27 y- i.e. y -3

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Step 3

Plugging, y=-3 in...

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x-(2)3) 7 x+6 7 or, x 7-6 >x 1

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Tagged in

Math

Algebra

Equations and In-equations