Помогите решить уравнения
115-6*X=79
18+(16-X)*8=90
(4900:У-280):60=7
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Verified answer
1)6x=115-796x=36
x=36/6
x=6
2) 18+128-8x=90
146-8x=90
8x=146-90
8x=56
x=56/8
x=7
3)4900/y-280=7*60
4900/4-280=420
4900/y=420+280
4900/y=700
y=4900/700
y=7