Question

In the equation 3x + 4y = 7, find x if y = 4 .​

Answer 1

x= ?

y =4

3x+4y =7

3x+4 (4) =7

3x+16 =7

3x = 7 -16

3x = -9

3x/3 = -9/3

x = (-3)

Answer 2

Answer:

-3

Step-by-step explanation:

3x+4y=7

if y=4

then

3x+4(4)=7

3x=7-16

3x=-9

x=-3