Solve. Don’t forget to check. x + y + z = 100 , ( 1 ) x − y = − 10 , ( 2 ) x − z = − 30 ( 3 ) Add equations (1) and (3): Add equations (2) and (4) and solve for x : Substitute 20 for x in equation (4) and solve for y : Substitute 20 for x and 30 for y in equation (1) and solve for z : The numbers check. The solution is.
Solve. Don’t forget to check. x + y + z = 100 , ( 1 ) x − y = − 10 , ( 2 ) x − z = − 30 ( 3 ) Add equations (1) and (3): Add equations (2) and (4) and solve for x : Substitute 20 for x in equation (4) and solve for y : Substitute 20 for x and 30 for y in equation (1) and solve for z : The numbers check. The solution is.
Solution Summary: The author explains the steps to solve the system of equation by elimination method.
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