Question

How do you do this please help me

Answer 1

Perimeter is the sum of the sides.
4x + 6 +3x + 2 = 57
7x + 8 = 57
7x = 49
x = 7

Answer 2

The perimeter of a triangle is the sum of all sides' lengths.

Thus,

`P=6+4x+(3x+2)=7x+8.`

Given
`P=57\ cm,` you get

`7x+8=57,\\ \\7x=57-8,\\ \\7x=49,\\ \\x=(49)/(7),\\ \\x=7\ cm.`

Answer: x=7 cm.