5道解方程急(2个结果)

求2道数学解方程……急~80-4x=561/2x+2/3x=5/6

最佳答案：×=6×=5/7这也太简单了吧,认真学习啦!
急求一道解方程题：若实数x、y满足x/(2^3+3^3)+y/(2^3+5^3)=1,x/(4^3+3^3)+y/(4^

最佳答案：x/(2^3+3^3)+y/(2^3+5^3)=1,x/35+y/133=1,133x+35y=35*133x/(4^3+3^3)+y/(4^3+5^3)=1,