Ответ:
P=7
R=9*7-13=50
S=(4/5):(40/50)+49=(4/5)*(50/40)+49=50
P*R-S=7*50-50=300
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Ответ:
P=7
R=9*7-13=50
S=(4/5):(40/50)+49=(4/5)*(50/40)+49=50
P*R-S=7*50-50=300