2/3x+4/9x=3,25/12x-4/15x=0.51x-0,2=8/15 помогите

Question

2/3x+4/9x=3,2
5/12x-4/15x=0.51
x-0,2=8/15 помогите

Answer 1

2/3x+4/9x=3,2
6\9х+4\9х=3.2
10\9х=32\10
х=32\10:10\9
х=32\10*9\10
х=144\50
х=2 22\25

5/12x-4/15x=0.51
25\60х-16\60х=0.51
9\60х=51\100
х=51\100:9\60
х=51\100*60\9
х=51\15
х=1 1\50

x-0,2=8/15 
х=8\15+1\5
х=8\15+3\15
х=11\15

Answer 2

6/9х+4/9х=3,2
10/9х=3,2
10/9х=3 2/10
10/9х=3 1/5
10/9х=16/5
х=16/5:10/9
х=16/5*9/10
х=72/25
х=2 22/25


25/60х-16/60х=0,51
9/60х=0,51
3/20х=0,51
3/20х=51/100
х=51/100:3/20
х=51/100*20/3
х=17/5
х=3 2/5

х=8/15+0,2
х=8/15+2/10
х=8/15+1/5
х=8/15+3/15
х=11/15