What is the value of x in the equation 3х - 4 y = 65 when y=42

Step-by-step explanation:

Step-by-step explanation:

3x - 4y = 65when y = 42so sub in 42 for y

3x - 4(42) = 65

3x - 168 = 65

3x = 65 + 168

3x = 233

x = 233/3 or 77 2/3

y-1700=200(x+4)

step-by-step explanation:

200(x+4) is 200x + 800 she is saving 200 per week x is the weeks and the -1700 is. us that’s howmuch she already had

the direct variation says that:

then the equation is of the form is given by:

            where k is the constant variation.

from the given table:

consider any value of x and m(x)=y

x = 2 and m(x)=y = 3

substitute these value in [1]; we have;

divide both sides by 2 we get;

⇒

check:

put x = -1 and m(x) = -1.5

substitute in the equation:

-1.5 = -1.5                   true

therefore, the function m(x) represents a direct variation

graph of this function as shown below: