7/10 practice

Solve :

x = 3

x+ y = 20

• ( 3, 17)

• ( 3, 23 )

• ( 17, 3 )

• ( 23,3)

Solve:

y = 5

x- y = 12

• (5,17)

• (17, 5)

• (5, 22)

• ( 22, 5 )

solve:

y = 10

2x + y = 20

• (5, 10)

• ( 10, 5 )

• ( 10, 10

Solve the following systems of equations using substitution:

2y + x = -15

x = 3y

• (-3, -9)

• (-9, -3)

• (-3, 9)

• (9, -3)

• (1, -4)

• (1, 4)

• (-4, -7)

• (-7, -4)

Solve the system by substitution. 
-2x - 2y = 16
y = -8

• (0, -8)
• (-8, 0)
• (-16, -8)
• (-16, -8)

Solve the system by substitution. 
-5x - 4y = -9
y = 6

• (3, 6)
• (6, -3)
• (-3, 6)
• (6.8, 3)

Solve the following systems of equations using substitution:

x = 6

y = 2x - 3

• (6, 6)

• (6, 9)

• (9, 6)

• (9, 9)

Solve the following systems of equations using substitution:

5x - 2y = 3

y = 2x

• (6, 3)

• (1, 2)

• (3, 6)

• (2, 1)