Explanation Given: The system of equations is: 3.2 x − 1.5 y = − 3 0.7 x + y = 2 Calculation: Consider the equations: 3.2 x − 1.5 y = − 3 …...…... (1) 0.7 x + y = 2 …...…... (2) Multiply the equation (1) by 10 . 10 ( 3.2 x − 1.5 y ) = 10 ( − 3 ) 32 x − 15 y = − 30 …...…... (3) Now, multiply the equation (2) by 15 . 15 ( 0.7 x + y ) = 15 ( 2 ) 10.5 x + 15 y = 30 …...…... (4) Add the equations (3) and (4). 32 x − 15 y = − 30 10.5 x + 15 y = 30 ( 32 + 10.5 ) x + ( 0 ) y = ( 0 ) Thus, the value of x is: 42.5 x = 0 x = 0 Substitute 0 for x in equation (3)

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Author: John Tobey Jr., Jeffrey Slater, Jamie Blair, Jenny Crawford

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Chapter 4.1, Problem 47E

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To calculate: The solution for the system of equations consisting of 3.2x−1.5y=−3 and 0.7x+y=2 by elimination method.

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Chapter 4.1, Problem 46E

Chapter 4.1, Problem 48E

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Chapter 4 Solutions

Intermediate Algebra (8th Edition)

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The solution for the system of equations consisting of 3.2 x − 1.5 y = − 3 and 0.7 x + y = 2 by elimination method.

Solution Summary: The author calculates the solution of the given system of equations by elimination method.

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To calculate: The solution for the system of equations consisting of 3.2x−1.5y=−3 and 0.7x+y=2 by elimination method.

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