Let m the tens digit and n the ones
the Original number is 10m+n
7(m+n) =10m+n
7m+7n=10m+n
6n=3m
Reversing the number 10n+m
10n+m=18+n+m
9n=18
n=2
6n=3m
6(2)=3m
3m=12
m=4
the number is 10m+n=10(4)+2=42
I think it’s 4
0+8x=23+2x
6x=23
x=3,8333
Use the formula a^2+b^2=c^ which is 7.21
174 is the missing number
Look up online "equation calculator" and it should be the first one to appear, "Symbolab" supper easy way to help you with problems!
