Mathematics, 31.03.2021 18:20, mahmudabiazp3ekot

In the diagram, angle 7 equals 30, angle 8 equals 3x, and angle 9 equals 4x-10. Find the value of x

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In the diagram, angle 7 equals 30, angle 8 equals 3x, and angle 9 equals 4x-10. Find the value of x...