Question

Answer 1

=>5x+25=4x-12

=>x=-37

Answer 2

\(\dfrac{x+5}{4}=\dfrac{x-3}{5}\)

=> 5x+25=4x-12

    5x-4x=-12-25

     x= -37

Answer 3

pttđ:

\(\dfrac{5\left(x+5\right)}{20}=\dfrac{4\left(x-3\right)}{20}\)

=> \(5x+25=4x-12\)

<=> 5x + 25 - 4x + 12 = 0

<=> x + 37 = 0

=> x = -37

Answer 4

\(5x+25=4x-12\\ =>5x-4x=-37\\ =>x=-37\)

Answer 5

b) \(\dfrac{x+5}{4}=\dfrac{x-3}{5}\)

\(\Leftrightarrow5\left(x+5\right)=4\left(x-3\right)\)

\(\Leftrightarrow5x+25=4x-12\)

\(\Leftrightarrow x=-37\)