[tex]\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[/tex]
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Answers & Comments
-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
[tex]\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[/tex]