Question

7x+3y=48 y=3x help me please

Answer 1

Ответ: х= 3; у=9

Пошаговое объяснение:

7x+3y=48

y=3x

7х+3*3х=48

7х+9х= 48

16х=48

х=3

у=3х

у=3*3

у=9

Answer 2

Ответ:

(3 ; 9 )

Пошаговое объяснение:

7x+3y=48

y=3x

Решу графическим способом

3y=48-7x

y=3x

y=(48-7x)/3

y=3x

y=16 - (7x)/3

y=3x

y=16 - (7x)/3

x  3  6

y  9  2

y=3x

x  0  1

y  0  3

Answer 3

To solve this system of equations, you can use the substitution method since you already have the value of y in terms of x from the second equation.

Here are the equations for reference:

1. 7x + 3y = 48
2. y = 3x

Now, substitute the value of y from equation 2 into equation 1:

7x + 3(3x) = 48

Now, simplify and solve for x:

7x + 9x = 48 16x = 48

Divide both sides by 16 to solve for x:

x = 48 / 16 x = 3

Now that you have found the value of x, you can substitute it back into equation 2 to find the value of y:

y = 3x y = 3 * 3 y = 9

So, the solution to the system of equations is:

x = 3 y = 9