Решите уравнения:
А)(9х-3,6)*(-0,5)= -7х+2,1
Б) 0,4*(х-9)-0,3(х+2)=0,7
а)-4.5х+1.8=-7х+2.1
-4.5х+7х=2.1-1.8
2.5х=0.3
х=0.12
б)0,4х-3.6-0.3х-0.6=0.7
0.4х-0.3х=0.7+3.6+0.6
0.1х=4.9
х=49
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Answers & Comments
а)-4.5х+1.8=-7х+2.1
-4.5х+7х=2.1-1.8
2.5х=0.3
х=0.12
б)0,4х-3.6-0.3х-0.6=0.7
0.4х-0.3х=0.7+3.6+0.6
0.1х=4.9
х=49