Show your work to show how many solutions each equation has (One, none, or infinite).

1) 11  2 + 15 = 8 + 7 + 9

 

2) 3(  14) + 2 = 4 + 5

 

3) 12 (8 + 26) = 13 + 4

 

4) 3 + 32 + 7 = 2(5 + 10)

 

5) 6    6 = 5 + 6

 

6) 6 + 10 = 2(3 + 5)

 

7) How many solutions does the equation 3(  7) = 3  21 have? How did you know it?