<span>6x+4(2x+7) при x =3
6х+8х+28=14х+28=14*3+28=42+28=70
</span><span>9y + 2(6y+5) при y = 7
</span><span>9у+12у+10=21у+10=21*7+10=157
</span>
............................
8,2t - 4,4t = 38,38
3,8t = 38,38
t = 38,38 : 3,8
t = 10,1
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(10,49 - х) : 4,02 = 0,805
10,49 - x = 0,805 * 4,02
10,49 - x = 3,2361
x = 10,49 - 3,2361
x = 7,2539