Answer:
hello so i calculated x, it equals 3.3 but im gonna leave the other half for you... im sorry.
Explanation:
"4 ( 7x - 8.1 ) = 3 ( 10x - 13)"
"28x - 32.4 = 30x - 39" [you have to put the x's and the normal numbers in the same place so you take the (28x) and put it on the other side and flip it and make it (-28x) and take (-39) filp it and make it (+39) one the other side so that makes it]--> " 39 - 32.4 = 30x - 28x "
so then it becomes...
6.6 = 2x [you divide bothe sides with two that makes...]
3.3 = x
And then you have to put 3.3 instead of x and you will get your answer so like calculate -->
4 ( 7 [3.3] - 8.1 ) for the perimeter of the square.
3 ( 3 [3.3] - 13) for the perimeter of the triangle.
Good luck to the person out there i hope i helped