Find the solution of the system of equations by substitution. Use pencil and paper. Draw a picture using algebra tiles to show the substitution.

Question

 Find the solution of the system of equations by substitution. Use pencil and paper. Draw a picture using algebra tiles to show the substitution.

3x - 11y = 59

x=4y+21

The soultion is ____

Answer 1

3x -11y = 59

x= 4y + 15

3(4y+15) -11y = 59

12y + 45 - 11y = 59

y = 59-45 = 14

x = 4(14) + 15 = 56 +15 = 71

x=71, y = 14