Question

for what value of x is the parallelogram a rhombus?
2x + 40
9x - 2
the figure is a rhombus when x = \square.

Explanation:

Step1: Set sides equal (rhombus has equal sides)

$2x + 40 = 9x - 2$

Step2: Solve for x

$40 + 2 = 9x - 2x$
$42 = 7x$
$x = 6$

Answer:

6