Question

Determineti nr. natural x din:207-(x+2)X7+33=100

Answer 1

$207-(x+2)*7+33=100 \\\\ 240-(x+2)*7=100 \\\\ 240-100=(x+2)*7 \\\\ 140=(x+2)*7 \\\\ x+2=140:7 \\\\ x+2=20 \\\\ x=20-2 \\\\ \boxed{x=18}$