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The value of x is 22.5528.Let ABC be the triangle , <A = 70, <B = 30 ,<C = 80.Sum of angles in a triangle is 180.70 + 30 + <C = 180 <C = 180 - 100<C = 80.Let sides be a = x , b = 12 and c = ?According to sines law,a/sin A = b/sin B = c/sin Csubstitute a ,b,A,B valuesa/sin A = b/sin Bx/sin 70 = 12/sin 30x = 0.9397*12/1/2= 11.2764*2/1x = 22.5528.Therefore the value of x is 22.5528.Learn more about the triangle here:https://brainly.com/question/2773823#SPJ1