year 8 w/c 11/5 form and solve equations

I think of a number, multiply it by 4 then subtract 7. I get an answer of 2. What number was I thinking of?

• 13

• 36

• 15

• 1

I think of a number, multiply it by 3, then add 8. My answer is -1. Choose the correct equation.

• 3n + 24 = -1

• 3n - 8 = -1

• 3(n + 8) = -1

• 3n + 8 = -1

I think of a number, subtract 7, then multiply by 3. My answer is 4. Choose the correct equation.

• n - 7 x 3 = 4

• 3(n - 7) = 4

• 3n - 7 = 4

• n - 21 = 4

I think of a number, divide it by 3 and then subtract 4. My answer is 5. Choose the correct equation.

• $\frac{n}{3}-4\ =\ 5$

• $n-\frac{4}{3}=5$

• $\frac{\left(n-4\right)}{3}=\ 5$

• n3 - 4 = 5

Matthew is t years old, Steve is 4 years older than Matthew. Altogether they are 48 years old. Write a simplified equation to show this

• t + 4 = 48

• t + t + 4 = 48

• 2t + 4 = 48

• t = 22

Kate is x years old, Mohammed is 1 year younger than Kate. Altogether they are 23 years old. Write a simplified equation to show this.

• x = 12

• 2x - 1 = 23

• x - x - 1 = 23

• x - 1 = 23

Darnesha is w years old. Tia is twice as old as Darnesha. The sum of their ages is 36. Write a simplified equation to show this.

• w + 2w = 36

• 3w = 36

• w + w + 2 = 36

• w = 12

A rectangular field is y metres wide. Its length is 5 metres longer than its width. The perimeter of the field is 18metres. Write a simplified equation to show this

• y + 5 = 18

• y + y + 5 = 18

• 2y + 5 = 18

• 4y + 10 = 18

Solve  $\frac{y}{3}-4\ =\ -2$  

• y = -18

• y = 6

• y = -6

• y = -18

Solve  $\frac{\left(y\ -\ 3\right)}{2}=-5$  

• y = -7

• y = 7

• y = 13

• y = -13