Question

maths class 8
show the processing as well​

Answer 1

$\sf\red{Given:}$

• $\sf \: y=5$
• $\sf \: z=8$

$\sf\red{To \:Find :}$

$\sf \: value \: of \:x$

$\sf\red{Solution:}$

$\sf \: z = \dfrac{2xy}{x + y}$

$\sf \: putting \: the \: value \: of \: z, \: we\: get$

$\sf \:⟹ 8 = \dfrac{2×x×5}{x + 5}$

$\sf \:⟹ 8= \dfrac{10x}{x +5}$

$\sf \:⟹{8(x + 5)} = 10x$

$\sf \:⟹8x + 40 = 10x \:$

$\sf \: ⟹8x-10x= -40 \:$

$\sf \:⟹-2x= -40$

$\sf \:⟹x=\dfrac{-40}{-2}$

$\sf \:⟹x=20$

Answer 2

Step-by-step explanation:

Given:

y=5\sf \: y=5y=5

z=8\sf \: z=8z=8

ToFind:\sf\red{To \:Find :}ToFind:

valueofx\sf \: value \: of \:xvalueofx

Solution:\sf\red{Solution:}Solution:

z=2xyx+y\sf \: z = \dfrac{2xy}{x + y}z=

x+y

2xy

puttingthevalueofz,weget\sf \: putting \: the \: value \: of \: z, \: we\: getputtingthevalueofz,weget

⟹8=2×x×5x+5\sf \:⟹ 8 = \dfrac{2×x×5}{x + 5}⟹8=

x+5

2×x×5

⟹8=10xx+5\sf \:⟹ 8= \dfrac{10x}{x +5}⟹8=

x+5

10x

⟹8(x+5)=10x\sf \:⟹{8(x + 5)} = 10x⟹8(x+5)=10x

⟹8x+40=10x\sf \:⟹8x + 40 = 10x \:⟹8x+40=10x

⟹8x−10x=−40\sf \: ⟹8x-10x= -40 \:⟹8x−10x=−40

⟹−2x=−40\sf \:⟹-2x= -40⟹−2x=−40

⟹x=−40−2\sf \:⟹x=\dfrac{-40}{-2}⟹x=

−2

−40

⟹x=20

please mark it brainliest answer