Equations Given a Variable

What is the value of x in this tape diagram?

• 7

• 5

• 35

• 5x

Is 3 a solutions for 20 - y = 17

• Yes

• No

Is 20 a solution for x ÷ 2 = 10

• Yes

• No

Is 0 a solution for 2x + 5 = 5

• Yes

• No

Is 6 a solution for n x 7 = 56

• Yes

• No

Is 13 a solution for r - 9 = 4

• Yes

• No

Are the equations equivalent?

x = 4 and 5 = 3x - 7

• Yes

• No

Are the equations equivalent?

b = 5 and 18 = 3 + 3b

• Yes

• No

Are the equations equivalent?

y = 5 and y - 2 = 3

• Yes

• No

Are the equations equivalent?

x = 9 and x + 3 = 11

• Yes

• No