Решите уравнение
1) (1/4+1/5)х=1 4/5
2) (2 1/12-1 5/6)х=3/4

1) (1/4+1/5)х=1 4/5; (5/20+4/20)х=9/5; 9/20х=9/5; х=9/5*20/9; х=4; /// 2) (2 1/12-1 5/6)х=3/4; (25/12-11/6)х=3/4; (25/12-22/12)х=3/4; 3/12х=3/4; х=3/4*12/3; х=3