Question

Помогите решить уравнения 115-6*х=73,540:х+85=91,18+(16-х)*8=90,(4900:у-280):60=7 плиз!!!!!!!!!!!!!!!!!!!!!!!

Answer 1

115-6х=73
-6х=73-115
6х=42
х=7
540:х+85=91
540:х=6
х=540:6
х=90
18+(16-х)*8=90
(16-х)*8=90-18=72
16-х=72:8
16-х=9
х=16-9
х=7
(4900:у-280)=7*60=420
4900:у=420+280=700
у=4900:700=7