Year 7 Equations

If x = 3, which one of the following equations is true?

• 4x = 21

• 2x + 4 = 12

• 9 - x = 6

• 2 = x + 1

• x - 3 = 4

When 11 is added to the product of 3 and x, the result is 53. This can be written as:

• 3x + 11 = 53

• 3(x + 11) = 53

• $\frac{x}{3}+11=53$
  

• $\frac{x+11}{3}=53$

• 3x - 11 = 53

Which of the following values of x make the equation 2(x + 4) = 3x true?

• 2

• 4

• 6

• 8

• 10

The equivalent equation that results from subtracting 3 from both sides of 12x - 3 = 27 is:

• 12x = 24

• 12x - 6 = 24

• 12x - 6 = 30

• 9x - 3 = 24

• 12x = 30

To solve 3a + 5 = 17, the first step to apply to both sides is to:

• add 5

• divide by 3

• subtract 17

• divide by 5

• subtract 5

The solution to 2t - 4 = 6 is:

• t=1

• t=3

• t=5

• t=7

• t=9

The solution of

 $\frac{2x}{7}=10$  is:

• x=35

• x=70

• x=20

• x=30

• x=5

The solution to the equation

 $10=\frac{3p+5}{2}$  is:

• p=5

• p=20

• p=15

• p=7

• p=1

The solution of 3(u + 1) = 15 is:

• u=5

• u=4

• u=11

• u=6

• u=3

A formula relating A, p and t is A = 3p - t. If A = 24 and t = 6, then p equals:

• 18

• 4

• 30

• 2

• 10