Question

x/7 +x = 5-x/3+1 find value of x​

Answer 1

Answer: 35/39

$\frac{x}{7} + x = \frac{5 - x}{4}$

$\frac{x + 7x}{7} = \frac{5 - x}{4}$

= 4(8x) = 7(5 - x)

= 32x = 35 - 7x

= 39x = 35

= $x = \frac{35}{39}$

Answer 2

Answer:

Step-by-step explanation:

x/{7+x} = {5-x}/{3+1}

After cross multiplication we get,

[x]*[4]=[5-x]*[7+x]

4x=35+5x-7x-x^2

multiplying with minus one we get,

-4x=-35-5x+7x+x^2

x^2+2x+4x-35=0

x^2+6x-35=0

using the quadratic formula we get,

x=-b+- [[b^2- 4ac]^{1/2}]/2a

b=6; c=35; a=1;

x=-6+-[36-140}^{1/2}/2

x=-6+-[-104]^{1/2}/2

This is the final answer.