CONSTRUCTING AND SOLVING EQUATIONS

Work out the value of x in this isosceles triangle.

• 2

• 4

• 12

• 48

Work out the value of y in this isosceles trapezoid

• 4

• 7

• 14

• 20

Work out the value of x in this isosceles triangle.

• 2

• 4

• 12

• 48

Work out the value of y in this parallelogram.

• 4

• 7

• 14

• 20

Work out the value of x in this isosceles triangle.

• 2

• 4

• 12

• 48

Work out the value of x and y in this rectangle.

• x = 8; y = 7

• x = 7; y = 8

• x = 7; y = 4

• x = 4; y = 7

Fathir thinks of a number. He multiplies it by 5 then subtracts 4. The answer is the same as 2 times the number and plus 20. 

Construct the right equation.

•  $5x-4=2x+20$  

•  $5\left(x-4\right)\ =\ 2\ \left(x+20\right)$  

•  $5\left(x-4\right)\ =\ 2\ \left(x+20\right)$  

•  $5x-4\ =\ 2x-20$  

Fathir thinks of a number. He multiplies it by 5 then subtracts 4. The answer is the same as 2 times the number and plus 20. What number did he think of?

• 6

• 7

• 8

• 9

Noval thinks of a number. He adds 5 then multiplies the result by 2. The answer is the same as 6 times the number take away 14.
Construct the right equation.

•  $\left(x+5\right)\times2\ =\ 6x\ +\ 14$  

•  $2\left(x+5\right)\ =\ 6x\ -14$  

•  $x+5\times2\ =\ 6x\ -\ 14$  

•  $2x+5=\ 6x\ +\ 14$  

Noval thinks of a number. He adds 5 then multiplies the result by 2. The answer is the same as 6 times the number take away 14. What number did he think of?

• 6

• 7

• 8

• 9