Answer :

The value of x is 21.

What are corresponding angles?

The angles that are in the same position on two parallel lines intersected by a transversal line on the parallel lines.

Corresponding angles are equal.

We have,

From the figure,

54° and ∠STR are alternate exterior angles.

So,

54 = ∠STR

Now,

∠STR + 2x + 4x = 180

54 + 2x + 4x = 180

6x = 180 - 54

6x = 126

x = 21

Thus,

x = 21

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Rewritten by : Barada

2x + 4x + 54 = 180
6x = 180 -54
6x = 126
x=126/6
x=21