Ответ:
а) 3-5.8x-2.2x-3=16
-5.8x-2.2x=16+3-3
-8x=16
x=-2
б) 21=-20-8(2x-0.5)
21=-20-16x+4
37=-16x
-37/16= x
в) 30-40x+51=35x+21
-75x=-60
x=75/60
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Answers & Comments
Ответ:
а) 3-5.8x-2.2x-3=16
-5.8x-2.2x=16+3-3
-8x=16
x=-2
б) 21=-20-8(2x-0.5)
21=-20-16x+4
37=-16x
-37/16= x
в) 30-40x+51=35x+21
-75x=-60
x=75/60