Algebra 3

3 marks · Normal

Solve the following linear equation. Give your answer in simplest form:

(a)

[3 marks]

Work this out on paper, then compare with the answer and worked solution below. With a free account you can submit written answers for marking.

Show answer

x = 4 (±0.05)

(a) x = 4

Common mistakes: Sign errors; incorrect clearing of fractions

Show mark scheme and worked solution

Marking points

M1 (a) · 1 mark · Moves constant to other side (follow-through)

M2 (a) · 1 mark · Correctly multiplies both sides to clear fraction or divides as appropriate (follow-through)

A1 (a) · 1 mark · Finds correct value for x: x = 4 (follow-through)

Worked solution

Add 4 to both sides:

Multiply both sides by 2:

x = 4