Question

guys please help ive been trying to figure it out for like an hour. i need to khow whats the value of x khowing that the perimeter is 51 cm​

Answer 1

x=4

Explanation:

first, you have to add all of the sides up:

x+2x+x+3x+7+5x-4=12x+7-4=12x+3

12x+3=51. now, we can subtract 3 from both sides, so that we can isolate x.

-3 -3

12x=48

x=4