Ответ №1
№94
1) 0.71x+1.98=0.37x-1.76
0.71x-0.37x=-1.76-1.98
0.34x= -3.74
x=-3.74:0.34
x= -11
2)0.18y-7.4=0.05y-5.71
0.13y=1.69
y=13
3)
5(5x-1)-2.7x+0.2x=6.5-0.5x
25x-5-2.7x+0.2x=6.5-0.5x
22.5x+0.5x=6.5+5
23x=11.5
x=0.5
4) 0.36x-0.6=0.3(0.4x-1.2)
0.36x-0.6=0.12x-0.36
0.24x=0.24
x=1
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