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GrogVix [38]
3 years ago
11

How to solve thus through substitution method. please do it step by step

Mathematics
2 answers:
Step2247 [10]3 years ago
8 0
Hey there!

To start, first solve the equation of -2x + 3y =4 for the value of x since the coefficients appear to be smaller and easier to work with than the equation 4x- 6y= 9.

To solve -2x+3y=4 for x, first subtract both sides by 3y to isolate -2x:
-2x+3y=4
-2x=-3y+4

Now, divide both sides by -2 to isolate or solve for the x variable:
-2x=-3y+4
x=3/2y-2

Now that you have x set equal to the expression 3/2y-2, substitute this value for x in the equation 4x-6y=9:
x=3/2y-2
4x-6y=9
4(3/2y-2)-6y=9

Now, simplify this expression and combine your like terms: 
4(3/2y-2)-6y=9
(4*3/2y)+(4*-2)-6y=9
6y-8-6y=9
-8=9

Because you end up in an untrue mathematical statement, your answer would be that there are no real solutions for this system. 

Hope this helps and have a marvelous day! :)



andrew11 [14]3 years ago
8 0
4x-6y=9
2x+3y=4

4x=9+6y
X=9/4+6y/4
2(9/4+6y/4)+3y=4
18/4+12y/4+3y=4
9/2+6y=4
6y=8/2- 9/2
6y= -1/2
y= -1/12 x= 17/8
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3 years ago
What numbers can give me 8 when added and 30 when multiplied
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In this problem, it is important to take note that the number of numbers to be utilized isn't specified so it can be up to a thousand numbers. It wasn't also specified if repeating of numbers is allowed or not. So with those taken into consideration and the condition presented in mind, the numbers that can give you 8 when added and 30 when multiplied are 2, 3, 5, -1, and another -1. The derivation from this is mainly from factorization and a little bit of logic.

here is the solution.

2 x 3 x 5 x -1 x -1 = 30
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Using the quadratic formula to solve 4x^2 – 3x + 9 = 2x + 1, what are the values of x?
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C but i could be wrong lol very wrong.
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3 years ago
I don't get this one?
Vlad1618 [11]

Answer:

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Step-by-step explanation:

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