Acertain number is multiplied by 4 and then 7 is added to the result then final answer is 39 find the number

4x + 7 = 39

    -7     -7

4x = 32

/4      /4

x = 8

The answer is 8.

so the possibilities of the measurement of the side of the triangle are either it is longest side or not the longest side

when it is the longest side

s < 25 + 35s < 60

if it is not the longest side

35 < 25 + s10 < sso 10 < s < 60so the perimeter70 < p < 130