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motikmotik
3 years ago
14

What is the solution of the system of equations? -4x+3y=-12 -2x+3y=-18

Mathematics
1 answer:
Kisachek [45]3 years ago
7 0

Answer:

Step-by-step explanation:

I've enclosed a graph to show you that there is one solution.

-4x + 3y = - 12

<u>- 2x + 3y = - 18</u><em><u>  </u></em><em>         </em>Subtract

-2x = 6                        Divide by - 2

-2x/-2 = 6/-2

x = - 3

- 4x + 3y = - 12

-4(-3) + 3y = - 12

12 + 3y = - 12

3y = - 12 - 12

3y = - 24

3y/3 = - 24/3

y = - 8

Which is exactly what the graph shows.

You can tell immediately that this has 1 or more solutions just by looking at the number in front of x and y in each each equation.

It's always a good idea to graph a question like this one. Desmos is a pretty good tool to use if you don't have a graphing calculator.

The y's are the same so you are 1/2 way home in saying what you did.

The x's are different so that means you have at least 1 solution.

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Can some on help me on this question?
mario62 [17]

Answer:

x=10 and x-7 is the answer

Step-by-step explanation:

a)2x-7=13

2x=13+7

2x=20

x=20/2

x=10

b)3x+4=25

3x=25-4

3x=21

x=21/3

x=7

i hope it will help you

6 0
3 years ago
Read 2 more answers
Answers for the 2 boxes please :)​
monitta

Answer:

x=1

y=2

Step-by-step explanation:

Multiply the second equation by 2

and then solve!

4 0
2 years ago
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Evaluate W - X if w = 18 and x = 6.<br> Giving BRIANLIEST
xenn [34]

Answer:

12

Step-by-step explanation:

18 -6

12

Hope that this helps you and have a great day :)

5 0
2 years ago
Which of the following gives a product of x^3 - 3x ?
Vilka [71]

Answer:

Option a

Step-by-step explanation:

Lets verify

RHS

\\ \rm\longmapsto x(x^2-3)

  • Use distributive law
  • a(b-c)=ab-bc

\\ \rm\longmapsto x(x^2)-3x

\\ \rm\longmapsto x^3-3x

\\ \rm\longmapsto LHS

Hence verifed

7 0
2 years ago
Read 2 more answers
1) What can u do to get 2x alone on the left side?
CaHeK987 [17]

Answer:

1)

82.5 - <u>8</u><u>2</u><u>.</u><u>5</u> + 2x = 338.5 - <u>8</u><u>2</u><u>.</u><u>5</u>

<u>2</u>x = <u>2</u><u>5</u><u>6</u>

2)

2x ÷ <u>2</u> = 256 ÷ <u>2</u>

x = <u>1</u><u>2</u><u>8</u>

Step-by-step explanation:

1)

In order to get rid 82.5, you have to substract the same value on both side to get a 0 value.

2)

In order to find the value of x, you have to divide the value that is sticked with x which is 2. As you divide 2 by 2, you will get 1 as a single value of x so you have to divide 2 to both side too.

5 0
3 years ago
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