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ch4aika [34]
3 years ago
5

Solve the system by substitution 5x+3y=8 3x+y=8

Mathematics
2 answers:
Doss [256]3 years ago
8 0

First you'd have to eliminate one of the variables, so which I used y. So to get rid of y, you need to multiply the whole equation, 3x+y=8, by 3. Which then you get 9x+3y=24.

On the second equation, it's stays the same. 5x+3y=8, except you chane the value of the number, so if it's positive change it to negative and vice versa.

So now you have -5x-3y=-8 and 9x+3y=24.

9x + 3y =24

-5x - 3y = 8

if you combine the terms, you'll see y is removed from the equation 3y-3y=0.

You're left with 4x=16, which x is 4.

Now you can substitute 4 for x to find y. Just use one of the equations to do this to, try 3x+y=8.

3(4)+y=8.

12+y=8

y=-4.

If you need the answer to be in a point form, it's (4,-4)


Olenka [21]3 years ago
7 0
There you go, hope that this helps

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35=7+4b Two- step equations
BlackZzzverrR [31]

Hi


35=7+4b in two steps


Step 1 ) Simplify both sides of the equation

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I hope that's help and have a great night :)


4 0
3 years ago
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Factor completely. x2 + 5x + 6 A. (x - 3)(x + 3) B. (x - 1)(x + 6) C. (x + 3)(x + 2) D. (x + 5)(x + 1)
zhuklara [117]

being x^{2} +5x+6 the answer is (x-3)(x-2)

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1. x^{2} +5x+6

second grade formala is used

x= \frac{-b±\sqrt{b^{2} } -4ac}{2a}\\ x=\frac{-5±\sqrt{5^{2} } -4.1.6}{2} \\ x= \frac{-5±1}{2} \\ x_{1} =-3  \\  x_{2} =-2

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3 years ago
Which expression is equivalent to -4x4x4<br> 4x4x4x4x4?
Gelneren [198K]

We have one -4 so we leave that alone.

4x4x4x4x4x4x4 is the same as 4^6

So, we can rewrite the equation to -4 * 4^6

Best of Luck!

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3 years ago
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