2(15-x)+1,5(15+x)=51. помогите срочно

Question

2(15-x)+1,5(15+x)=51. помогите срочно

Answer 1

2(15-x)+1,5(15+x)=51
30-2х+ 22.5+1.5х=51
-2х+1.5х=51-22.5-30
0.5х=-1.5
х=-3

Answer 2

30-2Х+22,5+1,5Х=51
1,5Х-2Х=30-22,5+51
-0,5Х=58,5\(-0,5)
Х=-117