Question

-5х-3=9; 6х+12=5х+3 ; 7у-11=10у+16

Answer 1

Ответ:
-5x-3=9. 6x+12=5x+3
-5x=9+3. 6x-5x=3-12
-5x=12 x=-9
x=-2,4
Пошаговое объяснение:
7y-11=10y+16
7y-10y=16+11
-3y=27
y= -9

Answer 2

$\displaystyle 1)-5x-3=9\\-5x=9+3\\-5x=12\\ \\x=-\frac{12}{5}=-2\frac{2}{5}=-2,4\\ \\2)6x+12=5x+3\\ 6x-5x=3-12\\x=-9\\\\3)7y-11=10y+16\\7y-10y=16+11\\-3y=27\\y=-9$