Question

5|x|+3=7 1.7|x|+4.9=10 2.5|3y|=15 Помогите!!

Answer 1

5|x|+3=7
5|x|=7-3
5|x|=4
|x|=4/5
x=4/5
x=-4/5



1.7|x|=5.1
1.7|x|=5.1
1.7x=5.1 x>0
1.7(-x)=5.1 x<0
x=3
x=-3