What is the rule for congruence of triangles that states if two sides and the included angle of one triangle are congruent to two sides and the included angle of another triangle, the two triangles are congruent?
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What is the value of x in the equation 5x + 8 = 23?
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Math question: Find the vertex coordinates of a parabola with equation π¦ = -2π₯^2 + 4π₯ - 1.