Question

3+x/4+x= -5/7 pls answer and by step to step explanation

Answer 1

Answer:

$\frac{3 + x}{4 + x} = \frac{ - 5}{7} \\ 7(3 + x) = - 5(4 + x) \\ 21 + 7x = - 20 - 5x \\ 21 + 20 = - 5x - 7x \\ 41 = - 12x \\ x = \frac{ - 41}{12}$

Answer 2

Answer:

x = (-41)/12

Step-by-step explanation:

3+x/4+x= -5/7

By cross multiplication, we have:

3+x/4+x = -5/7

= 7(3+x) = -5(4+x)

By multiplying, we have:

7(3+x) = -5(4+x)

= 21 + 7x = -20 + (-5x)

To get the variables (x) to LHS, we have:

21 + 7x = -20 + (-5x)

= 7x + 5x = -21 - 20

= 12x = -41

= x = -41/12

Hope it helps you!