3(n+5) three times n plus five n represents the unknown number
3x+5x
5*(3+x)=15+5x Fifteen plus five times that number
three
3a+5=20
5x+3
If you mean 3x+10 = 5x then the value of x works out as 5
9
25
38
The number is -13.
If the variable x represents the number: 5x + 3ParenthesesExponentsMultiplyDivideAddSubtractAlways remember this