решите уравнения :
a) x+( 1 200 - 900) = 1 500
б) (50 * 30) \ y = 15
в) с\( 1 200 \ 2) = 3
a) x+( 1 200 - 900) = 1 500
б) (50 * 30) \ y = 15
в) с\( 1 200 \ 2) = 3
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x+300=1500
x=1500-300
x=1200
б) (50 * 30) / y =15
1500 / y =15
y=1500 / 15=100
в) с / (1200 / 2)=3
c / 600=3
c=600*3
c=1800
х +300=1500
х=1500-300
х=1200
б) (50*30)/у=15 |*у
50у*30у=15у
1500у=15у |:15
у=100
в) с/(1200/2)=3
с/600=3
с=3*600
с=1800