Question

The length and width of a rectangle are 7 cm and (x - 8) cm respectively. Find the value of x if the area of the rectangle is 42 cm2.

Answer 1

$here \: is \: your \: answer \\ area \: of \: rectangle \: is \: l \times b \\ now \: length \: given \: 7cm \: and \: breadth \: given \: is \: (x - 8) \\ now \: \\ ( x - 8) \: \times 7 = 42{cm}^{2} \\ = 7x - 56 = 42 {cm}^{2} \\ = 7x = 42 + 56 \\ = 7x = 98 \\ = x = \frac{98}{7} \\ = x = 14 \\ hence \: the \: value \: of \: x \: is \: 14 \\ hope \: it \: helped \\ plz \: mark \: as \: brianliest \\ \\ \\ \\ stay \: home \: stay \: safe$

Answer 2

Answer:

Step-by-step explanation: Given :

Length = 7cm and Breadth = (x-8) cm

Area of a triangle = Length × Breadth

42 = 7(x-8)

x-8 = 6

x = 14