-1-4(-7+8х)=-2х-6
-1+28-32х=-2х-6
-32х+2х=-6+1-28
-30х=-33
х=1,1
5(5+3х)-10х=8
25+15х-10х=8
5х=8-25
5х=-17
х=-3,4
-6=-9(7+х)+4х
-6=-63-9х+4х
9х-4х=-63+6
5х=-57
х=-11,4
8х+4(7+8х)=4х+7
8х+28+32х=4х+7
8х+32х-4х=7-28
36х=-21
х=-7/12
8¹¹=(2³)¹¹=2²²
32⁻²=(2⁵)⁻²=2⁻¹⁰
4⁷=(2²)⁷=2¹⁴
(2²² *2⁻¹⁰)/2¹⁴=2²²⁺⁻¹⁰⁻¹⁴=2⁻²=1/4=0,25
6d-(3d-(r-8d-2r)) =6d-(3d-(8d-r)) =6d-(3d-8d+r) =6d-(-5d+r) =6d+5d-r =11d-r
<span>1) 100-24-46=30(%) </span>
<span>2) 30% = 0,3 </span>
<span>3) 450 : 0,3 = 1500(км) </span>
<span>Ответ: 1500 км </span>