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Calculate the value of $x$.
Mathematics 0580 · IGCSE · Area and perimeter
Calculate the value of $x$.
This 3-mark question has a full step-by-step worked solution and mark scheme. One marking point: “Using $\frac{1}{2} \times (7 + 11) \times x = 12 \times 6$, therefore $x = 8$” …