Simple Equations in One Variable

What is the first step in solving this equation:
5x + 7 = 12

• Divide by 5

• Subtract 5

• Multiply by 7

• Subtract 7

Set up equation for the following statement by taking 't' as the variable :

'one-forth of a number minus 4 gives 8'.

• t ⁄4 - 4 = 8

• 4t + 4 = 8

• t ⁄4 + 4 = 8

• 4t - 4 = 8

Find the value of x :

3 (x - 2) = 9

• x = 5

• x = 7

• x = 6

• x = 8

Which equation has w = 8 as the solution?

• 8w= 64

• 16w = 240

• 16 - w = 9

• 4 + w = 10

Solve:
-4x = 24

• 20

• -20

• 6

• -6

Five less than twice a number is equivalent to 47.

• 5 - 2x = 47

• 2x - 5 = 47

• 5x - 2 = 47

• 2 - 5x = 47

Three times the sum of a number and 7 is equivalent to 57.

• 3x + 7 = 57

• 3(x + 7) = 57

• 7x + 3 = 57

• 7(x + 3) = 57

Manu's father's age is 4 years more than three times Manu's age. Find Manu's age, if his father is 46 years old.

• 14

• 15

• 16

• 18