Question

Dau coroniță ex 10 va rog cât de repede

Answer 1

d= i × c + r
48 ×98 = 4560
d = 4560 + 98 = 4658
c = 52
r = 30
i = ( d - r ) : c = (4658 - 30 ) : 52 = 4628 : 52 = 89

Answer 2

$d = 48 \times 95 + 98 \\ d = 4560 + 98 \\ d = 4658 \\ 4658 \div i = 52 \: r \: 30 \\ i = (4658 - 30) \div 52 \\ i = 4628 \div 52 \\ i = 89$