Algebra (Intro) — Chapter Test

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In the term 4x, what is x?

x stands for an unknown number, so it is a variable.

Write '3 times a number x' as an expression.

3 times x is 3x.

Continue the pattern of terms: n, 2n, 3n, ___ ?

The next multiple of n is 4n.

Write '7 less than y' as an expression.

7 less than y is y − 7.

If x = 5, what is 2x + 3?

2 × 5 + 3 = 13.

If a = 6, what is 4a?

4 × 6 = 24.

Solve: x + 8 = 15.

x = 15 − 8 = 7.

Solve: 5x = 35.

x = 35 ÷ 5 = 7.

Solve: x − 6 = 9.

x = 9 + 6 = 15.

Q10

If y = 2, what is 3y + 4?

3 × 2 + 4 = 10.

Q11

A pen costs ₹x. If x = 20, what do 5 pens cost?

5x = 5 × 20 = ₹100.

Q12

Riya is x years old now. In 5 years she will be x + 5. If x = 10, how old will she be?

10 + 5 = 15 years.

Q13

Solve: 2x + 3 = 11.

2x = 8, so x = 4.

Q14

Solve: 3x − 2 = 13.

3x = 15, so x = 5.

Try again ↻