Question

all these are linear equations are equivalent to 3x-4y=20 except for one:

Answer 1

\[a. \frac{ 3 }{ 4 }x-5\]

Answer 2

\[b. 8y+40=6x\]

Answer 3

\[c.2y=\frac{ 3 }{ 2 }x+10\]

Answer 4

C :P

Answer 5

\[d. \frac{ 1 }{ 5 }y=\frac{ 3 }{ 20 }x-1\]

Answer 6

@sami-21 can you kindly explain it to me? i have a big test tomorrow

Answer 7

sure

Answer 8

simplify the give equation little bit
\[\huge 3x-20=4y \]
divide by 4 both sides
\[\Huge y=\frac{3}{4}x-5\]
( this is in fact option a )

Answer 9

now for option b
divide the whole equation with 2
4y+20=3x
or
\[\Large 4y=3x-20\]
divide both sides by 4
\[\Large y=\frac{3}{4}x-5\]
which is again simila to a and given equation

Answer 10

now check option d
multiply whole equation with 5
\[\Large y=\frac{3}{4}x-5\]
which is also similar to previous ones

Answer 11

for option c divide whole equation with 2

\[\Large y=\frac{3}{4}x+5\]
its different there is plus sign with 5 !!!

Answer 12

Still confused ?

Answer 13

a little bit.

Answer 14

ok lets look at another way we will make the original equation from option a, b and d

Answer 15

yayy!

Answer 16

option a is
\[\Large y=\frac{3}{4}x-5\]

multiply whole equation with 4
\[\Large 4*y=4(\frac{3}{4})x-4*5\]
\[\Large 4y=3x-20\]

rearrange
\[\Large 3x-4y =20\]

are you ok with this ? let me know if there is any confusion

Answer 17

i see so thats why you chose D because it has the only positive sign !

Answer 18

i choosed C :)

Answer 19

i mean c xD haha

Answer 20

Sorry I got to go will be back after a while .

Answer 21

okay sure ! thanks for the help btw

Answer 22

welcome :)