1)135-(x+17)=84
135-x-17=84
135-17-84=x
34=x
x=34
2)(x-16)-94=17
x-16-94-17=0
x=16+94+17
x=127
1) если а = 489.004, b = 356.749
a + b = 489.004 + 356.749 = 845.753
Ответ: 489.004 + 356.749 = 845.753
2) если а = 489.004, b = 356.749
а + b = 489.004 - 356.749 = 132.255
Ответ: 489.004 - 356.749 = 132.255
56*4=14см
Р=14*2+4*2
Р=28+8
<span>Р=36см</span>
16x + 5 = 133
16x = 133 - 5
16x = 128
x = 128 : 16
x = 8
<span>42r-28r+180=600</span>
42r - 28r = 600 - 180
14r = 420
r = 420 : 14
r = 30.