Mathematics 0580 · IGCSE · Equations

Equations — practice question

The relationship is given by $s = 4t + 3u$.
(a)[2]

Calculate $s$ for $t = 2.6$ and $u = -0.4$.

(b)[2]

Solve the equation $5x - 7 = 10$.

Worked solution & mark scheme

This 4-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Substitution: $4 \times 2.6 + 3 \times (-0.4)$” …

  • Full mark scheme, point by point
  • Step-by-step worked solution
  • Write your answer & get it marked instantly by AI