document.write( "Question 962467: Δ ABC is isosceles. Angles B and C are congruent. The m∠A = 40°, m∠B = (3x + 1)°. Find x.
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Algebra.Com's Answer #588058 by stanbon(75887)\"\" \"About 
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Δ ABC is isosceles. Angles B and C are congruent. The m∠A = 40°, m∠B = (3x + 1)°. Find x.
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\n" ); document.write( "In an isosceles triangle congruent angles must be equal in measure.
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\n" ); document.write( "Equation:
\n" ); document.write( "3x+1 = 40
\n" ); document.write( "3x = 39
\n" ); document.write( "x = 13
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\n" ); document.write( "Cheers,
\n" ); document.write( "Stan H.
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