Answer
$x = 13$
Work Step by Step
In a parallelogram, opposite angles are congruent. Let us set opposite angles equal to one another to solve for $x$:
$x + 38 = 4x - 1$
Subtract $38$ from each side of the equation to isolate constants on one side of the equation:
$x = 4x - 39$
Subtract $4x$ from each side of the equation to isolate the variable on one side of the equation:
$-3x = -39$
Divide each side of the equation by $-3$ to solve for $x$:
$x = 13$
