Question: rice and Problem-Solving Exercises MATHEMATIC Solve each system using substitution. Check your answer. 11. x+y=8 y=3x 12. 2x+2y=38 y=x+3 14. y=8-x 15. y=-2x+6 7=2-y 3y-x+3=0

rice and Problem-Solving Exercises MATHEMATIC Solve each system using substitution. Check your answer. 11. x+y=8 y=3x 12. 2x+2y=38 y=x+3 14. y=8-x 15. y=-2x+6 7=2-y 3y-x+3=0 17. y-2x=3 18. 4x=3y-2 3x-2y=5 18=3x+y

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