Question

Find the value of x, then find EF.
3x + 5
7x - 39

X=
EF=

Answer 1

x = 8.8

EF = 22.6

Explanation:

The given figure is of a rectangle.

We know that the opposite sides of a rectangle are parallel and equal.

So,

• 3x+5 = 7x-39
• 3x-7x = -39-5
• -5x = -44
• x = -44/-5
• x = 8.8

Now, finding EF

• 7x-39
• 7×8.8-39
• 61.6-39
• 22.6