Question

Решите уравнения 0,5x+3=0,2x; -0,4a-14=0,3a; 2x-6целых1/4=3/4x+7целых1/2; 6,9-9n-33,1; 3/4k-12,5=9/8k-1/8

Answer 1

0,5х+3=0,2х
0,5-0,2х=-3
0,3х=-3
х=-10

-0,4а-14=0
-0,4а=0+14
-0,4а=14
а=-35

2х-6 1/4=3/4х+7 1/2
2х-3/4х=7 1/2+6 1/4
1 1/4х=13 3/4
х=11

6,9-9n-33,1 ????

3/4k-12.5=9/8k-1/8
3/4k-9/8k=-1/8+12 1/2
-3/8k=99/8
k=-33