1) -7х+2х=30-3
-5х=27
х=27:(-5)
х= -5 2/5
2) 0,3х-0,6=0,1х+2
0,3х-0,1х=2+0,6
0,2х=2,6
х=2,6:0,2
х=13
3) 2/9х-2/6=6х-2х+2*5/4
2/9х-6х+2х=10/4+2/6
2/9х-54/9х+18/9х=5/2+1/3
-34/9х=15/6+2/6
-34/9х=17/6
х=17/6:(-34/9)
х=17/6*(-9/34)
х= -3/4
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Verified answer
1) -7х+2х=30-3
-5х=27
х=27:(-5)
х= -5 2/5
2) 0,3х-0,6=0,1х+2
0,3х-0,1х=2+0,6
0,2х=2,6
х=2,6:0,2
х=13
3) 2/9х-2/6=6х-2х+2*5/4
2/9х-6х+2х=10/4+2/6
2/9х-54/9х+18/9х=5/2+1/3
-34/9х=15/6+2/6
-34/9х=17/6
х=17/6:(-34/9)
х=17/6*(-9/34)
х= -3/4