Question

află Nr necunoscut (5×5+6×6-r)+6×5-5×10=9:3​

Answer 1

(5×5+6×6-r)+6×5-5×10=9:3

(5×5+6×6-r)+6×5-5×10=3

(25+36-r)+30-50=3

(61-r)+30-50=3

(61-r)+30=50+3=53

61-r=53-30=23

61-r=23

r=61-23=38

Answer 2

$(5 \times 5 + 6 \times 6 - r) + 6 \times 5 - 5 \times 10 = 9 \div 3$

$(25 + 36 - r) + 30 - 50 = 3$

$(61 - r) + 30 - 50 = 3$

$61 - r + 30 - 50 = 3$

$41 - r = 3$

$- r = 3 - 41$

$- r = - 38$

$r = 38$