Section: Mathematical Reasoning

26) Solve using the substitution method: 

NOTE: Round long decimals to the nearest one hundredth. 

y = 3x - 87

3x + 2y = 21

1. x=-21.67
   y=21.99
2. x=21.67
   y=-21.99
3. x=21.67
   y=21.99
4. x=-21.99
   y=-21.67