Question

Решите уравнение: 5х-15=0
26х-0,8=7
17,5х-0,5=34,5
7/9х+3=2/3х+5
11х-4х=14
9х+4х=-26

Answer 1

1, 5х=15
х=3
2, 26х=7+0,8
26х=7,8
х=7,8/26
х=0,3
3, х=?
4, 7/9х+3=2/3х+5
7/9х-2/3х=5-3
7-6/9х=2
1/9х=2
5, 11х-4х=14
11х=14
х=14/11
6, 9х+4х=-26
13х=-26
х=-26/13
х=-2