0.15х-0.15×4=9.9-0.3х-0.3×1
0.15х-0.6=9.9-0.3х-0.3
0,15х+0.3х=9.9-0.3+0.6
0.45х=10.2
х=22.2/3
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Ответ--------------------------
1,2:36+1,2:0,25-1цел 5/16=1/30+4,8-1цел 5/16=8/240+ 4цел 192/240- -1цел 75/240=3 цел 25/48