Substitution in Equations

When a = 2, calculate the value of 3a + 5

• 11

• 7

• 15

• 10

When a = 4, calculate the value of 2a - 7

• 1

• -3

• 6

• 11

When a = 6, calculate the value of 4a + 3

• 36

• 27

• 24

• 15

When a = 1, calculate the value of 5a - 2

• 7

• 1

• 3

• 10

10. Solve the following system of equations: 5x - 4y = 3 and 2x + 3y = 8

• x = 4, y = 3

• x = 2, y = 1

• x = 3, y = 2

• x = 1, y = 5

Use SUBSTITUTION METHOD

5x + 3y = 7

y = 4

• (4,1)

• (4,-1)

• (1,4)

• (-1,4)

Which choice shows substitution correctly?

• 3x - (-6x +3) = 10

• 3(-6x + 3) - y = 10

29x+37y=103 and 37x+29y = 95 then

• x=1, y=2

• x=2, y=1

• x=3, y=2

• x=2, y=3

x = y - 2
4x + y = 2

• (2,0)

• (0,2)

• (0, -2)

• (-2,0)

If x+y=14 and x-y=4 then the values of x and y are_________

• x=4 and y = 5

• x = 9 and y = 7

• x = -6 and y = 5

• x = 9 and y = 5