Question

U (48 + 5x2x3:2):u=81:9
V 500 - 100 : 2 = 3900 + v
W) 1000:5:4:10 + (96 - w) = 11
aflati numarul necunoscut
urgent !​

Answer 1

$(48 + 5 \times 2 \times 3 \div 2) \div u = 81 \div 9 \\ (48 + 30 \div 2) \div u = 9 \\ (48 + 15) \div u = 9 \\ 63 \div u = 9 \\ u = 63 \div 9 \\ u = 7$

$500 - 100 \div 2 = 3900 + v \\ 500 - 50 = 3900 + v \\ 450 = 3900 + v \\ - v = 3900 - 450 \\ - v = 3450 \\ v = - 3450$

$1000 \div 5 \div 4 \div 10 + (96 + w) = 11 \\ 5 + 96 + w = 11 \\ 101 + w = 11 \\ x = 11 - 101 \\ x = - 90$