4. Решите уравнения 1/3х+5/9х=7,2 1/6х+5/12х=8,4

Question

4. Решите уравнения
1/3х+5/9х=7,2 1/6х+5/12х=8,4

Answer 1

1/3х+5/9х=7,2,
3/9х+5/9х=7,2,
8/9х=7,2,
х=7,2:8/9,
х=7,2*9/8,
х=8,1,

1/6х+5/12х=8,4,
2/12х+5/12х=8,4,
7/12х=8,4,
х=8,4:7/12,
х=8,4*12/7,
х=14,4