D=25;
x1=-9+5/14=-4/14=-2/7;
x2=-9-5/14=-1;
Ответ: x1=2/7; x2=-1
1) 1 ≤ x ≤ 32
x = 2; 3; 5; 7; 11; 13; 17; 19; 23; 29; 31
2) 31 ≤ x ≤ 47
x = 31;<span> 37; 41; 43; 47
3) 101 ≤ x ≤ 114
x = </span><span>101; 103; 107; 109; 113</span>
<span>1.78x+0.84=1.34-0.72x
</span>1.78x+0.72x=1.34-0.84
2.5х=0.5
х=0.2
<u>Ответ: 0.2</u>
1ц=100кг=100 000г
1кг=1000г
15*100 00+27*1000+3=1 500 000+27 000+3=1 527 003г