I believe it's a solution
Since is addition you do the opposite and subtract 12 from 12 and -5 then 12 cancels out and -5-12=-17
X=7
10x-2=9x+5
X=7
Lol it says I need more characters to submit this
25 girls and 50 boys!!
49 divided by 7 = 7.
So there were 7 adults.
49 + the 1 it mentioned = 50 boys
50 divided in half = 25 girls.
50+25+7 = 82.
Answer:
√194 i think
Step-by-step explanation: