classifying triangles show your work

For 12 to 15, solve each problem given the information. 12. If A/KL is an equilateral triangle, JK = 13x + 5, KL = 17x - 19, and JL = 8x + 35, find x and the measure of each side. 13. AQRS is an equilateral triangle. If QR is seven less than twice x, RS is 61 less than five times x, and QS is 11 more than x, find x and the measure of each side. 14. ACDE is an isosceles triangle with CD = DE. If CD = 9x - 25, DE = 6x + 8, and CE = 10x - 73, find x and the measrue of each side. 15. AWXY is an isosceles triangle with WX = WY. If WX is three more than four times x, XY is seven less than five times x, and WY is 66 less than seven times x, find the measure of each side