题目

Man Kaur started running in 2009, when she was in her 90s - it was her son's idea - and began getting medals. We first wrote about her when she was 101. Is she still a track and field star?At 103, Man Kaur is not only going strong. She's getting others to follow in her footsteps. India's oldest female athlete is spending her summer coaching 30 young athletes.Kaur and her 81-year-old son and trainer, Gurdev Singh, were invited for two weeks to several universities in Baru Sahib in the mountains of India, but their methods made such an improvement in the students5 performance. They were asked to解方程（1）4x+3（x-20）=8x-7（20-x）      （2）y0.7-0.17-0.2y0.03=1．