-3x+y=2 and mx+ny=-6 For what values of m and n would the system have infinite solutions?

2x+8y=2 and x+by=c For what values of b and c would the system have NO solution?

If a-b=7 and 2a+b=-1, then b=

2x-y=-8 and 3x+2y=2. What is the value of x if the following equations are true?

y=5x-2 and 10x-2y=8. Tell what kind of solution this system will have.

y=2x-1 and 3x+3y=15 What is the solution to this system?

15x+3y=9 and 10x+7y=-4. What is the solution to this system?

-x-5y-5z=2 and 4x-5y+4z=19 and x+5y-z=-20. Solve the system.

-6x+5y+2z=-11 and -2x+y+4z=-9 and 4x-5y+5z=-4. Solve the system.

Dennis mowed his next door neighbor’s lawn for a handful of dimes and nickels, 80 coins in all. Upon completing the job he counted out the coins and it came to $6.60. Which system could be used to find the exact number of dimes and nickels?

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