Mathematics 9709 · AS & A Level · Algebra

Algebra — practice question

For the equation $5|x| = 5 - 2x$, the two solutions are $x = a$ and $x = b$, with $a < b$.

(main)[5]

Find the value for $|3a - 1| + |7b - 1|$.

Worked solution & mark scheme

This 5-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Solve $5x=5-2x$ and hence obtain $x=\frac{5}{7}$” …