Respuesta :

rahatmath220

Answer:


Step-by-step explanation:

we know, For a parallelogram-

opposite sides are equal.

So, in QRST , we get

RS=QT

Using the values we get

4a=3a+7

subtracting  3a

4a-3a=3a+7-3a

or, a=7


Ans.    a=7

smmwaite

Answer

7


Explanation

The opposite sides of a parallelogram are equal and parallel.

∴ 3a + 7 = 4a

3a - 4a = -7

-a = -7

-a = -7

Divide by -1 both sides of the equation,

    a = 7