Question

Решите уравнение: 13-100х=0
7х-4=х-16
13-5х=8-2х
4у+15=6у+17
5х+(3х-7)=9
3у-(5-у)=11
(7х+1)-(6х+3)=5
(8х+11)-13=9х-5

Answer 1

$13-100x=0\ -100x=-13 \ 100x=13 \ x=13/100=0,13 \ \ 7x-4=x-16 \ 7x-x=-16+4 \ 6x=-12 \ x=-12/6=-2 \ \ 13-5x=8-2x \ -5x+2x=8-13 \ -3x=-5 \ x=5/3 \ \ 4y+15=6y+17 \ 4y-6y=17-15 \ -2y=2 \ y=2/(-2)=-1 \ \ 5x+(3x-7)=9 \ 5x+3x-7=9 \ 5x+3x=9+7 \ 8x=16 \ x=16/8=2 \ \ 3y-(5-y)=11 \ 3y-5+y=11 \ 3y+y=11+5 \ 4y=16 \ y=16/4=4 \ \ (7x+1)-(6x+3)=5 \ 7x+1-6x-3=5 \ 7x-6x=5-1+3 \ x=7 \ \ (8x+11)-13=9x-5 \ 8x+11-13=9x-5 \ 8x-9x=-5-11+13 \ -x=-3 \ x=3$