Question

Решите срочно!!!!!!!!!!!!!!

Answer 1

1)4х-3х=8+5
х=13
2)2x-x=15-15
x=0
3)4a=2.4
a=2.4:4
a=0.6
4)-k-7k=0
-8k=0
k=0
5)2/5x+7/10x=12-6
4/10x+7/10x=6
11/10x=6
x=6:11/10
x=6*10/11
x=60/11
x=5целых 5/11