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2 years ago

Solve for the value of x and y when 3x+2y=24 , x+y=9 step wise explanation plz

Mathematics

2 answers:

OLga [1]2 years ago

6 0

Answer:

{x,y} = {2,9}

Step-by-step explanation:

Solve equation [2] for the variable y

[2] 2y = -6x + 30

[2] y = -3x + 15

// Plug this in for variable y in equation [1]

[1] 3x + 2•(-3x+15) = 24

[1] -3x = -6

// Solve equation [1] for the variable x

[1] 3x = 6

[1] x = 2

// By now we know this much :

x = 2

y = -3x+15

// Use the x value to solve for y

y = -3(2)+15 = 9

grigory [225]2 years ago

4 0

This is what I got. Tell me if I got it wrong.

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Answer:

Here is the complete question (attachment).

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Step-by-step explanation:

We know that a general exponential function is like, $y=a(b)^{x}$

We can find the answer by hit and trial method by plugging the values of $(x,y)$ coordinates.

Here we are going to solve this with the above general formula.

So as the points are $(1,16)$ then for $x=1,\ y=16$

Can be arranged in terms of the general equation.

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Plugging the values in equation 2.

We have

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Plugging $b=2$ in equation 1.

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