5.3 Exercises Check It Out Help with Homework BigIdeasMath Scom Vocabulary and Concept Check 1. WRITING Describe how to solve a system of linear equations by elimination. 2. NUMBER SENSE When should you use multiplication to solve a system of linear equations by elimination? 3. WHICH ONE DOESN'T BELONG? Which system of equations does not belong with the other three? Explain your reasoning. 3x + 3y = 3 -2x + y = 6 2x + 3y = 11 x+y=5 2x - 3y = 7 2x - 3y = -10 3x - 2y = 10 3x - y = 3 Practice and Problem Solving Use a method from Activity 1 to solve the system. 4. xty=3 5. -x + 3y = 0 6. 3x + 2y = 3 x - y =1 x + 3y = 12 3x - 2y = -9 Solve the system of linear equations by elimination. Check your solution. 1 7. x + 3y = 5 8. x - 2y = -7 9. 4x + 3y = -5 -x-y= -3 3x + 2y = 3 -x + 3y = -10 10. 2x + 7y = 1 11. 2x + 5y = 16 12. 3x - 2y = 4 2x - 4y = 12 3x - 5y = - 1 6x - 2y =-2 13. ERROR ANALYSIS Describe and 5x + 2y = 9 Equation 1 correct the error in solving the X 3x - 2y = -1 Equation 2 system of linear equations. 2 x = 10