Year 8 Equations Test

If x = 4, which of the following equations is true?

• 3x − 3 = x + 5

• 4x + 7 = 21

• 9 − x = 6

• 2x = 6

Which of the following are incorrect

• 7 + 3 = 2 X 5

• 10 − 5 = 25

• 3 X 6 = 9 + 7

6 more than the number k is 12. An equation that represents this is

• k − 6 = 12

• 6 − k = 12

• k + 6 = 12

• 12k = 6

The number n is tripled and then subtracted from 17 and the result is 5.

An equation that represents this is:

• 17 − 3n = 5

• 3(n − 17) = 5

• 3n − 17 = 5

• 3(17 − 3n) = 5

• 3(17 − n) = 5

Which of the following equations does not have the solution x = 6?

• 8x = 48

• x + 7 = 13

• 15 − x = 9

• x + 6 = 0

The solution to the equation 3x + 4 = 13 is:

• x = 1

• x = 2

• x = 3

• x = 4

• x = 5

• adding 7 to both sides

• multiplying both sides by 4

• adding 2 to both sides

• subtracting 7 from both sides

• dividing both sides by 5

An electrician charges a $40 call-out fee and $80 per hour. On a particular job, the electrician charged $360. The electrician worked for:

• 2 hours

• 3 hours

• 4 hours

• 5 hours

• 6 hours

Solve Algebraically

a + 6 = 13

Solve Algebraically

7b = 35