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Svetradugi [14.3K]
3 years ago
13

3x + 2y = 12 How do I solve

Mathematics
2 answers:
Firdavs [7]3 years ago
7 0

divide 3 from 3x and 12 and then divide 2 from 2y and 12 and you should have your answer.

densk [106]3 years ago
5 0

Answer:

y= -3/2x+6

Step-by-step explanation:

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Evaluate the expression if a = 9 and b = 2. 5(a 3b) 20 51 70 75
devlian [24]
5(a + 3b) = 5(9 + 3(2)) = 5(9 + 6) = 5(15) = 75
5 0
3 years ago
A third of a number 9 (number phrase)
lakkis [162]

Answer:

A third of 9 is 3.

Step-by-step explanation:

9 / 3 = 3.

3 * 3 = 9

8 0
3 years ago
Factor the expression k^2+5kf-50f^2
Llana [10]

Answer:

(k+10f) (k-5f)

Step-by-step explanation:

k^2+5kf-50f^2

What 2 numbers multiply to -50 and add to +5

10 *-5 = -50

10+-5 = 5

(k+10f) (k-5f)

8 0
3 years ago
−4x+7y+5=0<br> x−3y=−5<br> ​ <br><br> How many solutions does the system have?
xeze [42]

   

Solution:  

Using Substitution Method:

-4x+7y=-5   (Equation 1)

x-3y=-5       (Equation 2)

get the value of x from Equation 2

x=3y-5     (Equation 3)  

Put the value of x from Equation 3 in Equation 1

-4(3y-5)+7y=-5

-4(3y)+20+7y=-5

-12y+7y=-5-20

-5y=-25

Negative sign on both sides cancels each other

y=25/5

y=5

Putting value of y in equation 3

x=3(5)-5

x=15-5

x=10

Therefore,   [x,y]=[10,5]

Using Elimination Method

-4x+7y=-5   (Equation 1)

x-3y=-5       (Equation 2)

Multiply equation 2 with -4 in order to eliminate the x term

-4(x-3y)=-5*4

-4x+12y=20     (Equation 3)

Adding Equation 1 and 3

-4x+7y=-5    

-4x+12y=20    

+    -     = -   (Change Of Sign with x and y terms)

-----------------

0x-5y = -25

-5y=-25

y=5  

Substituting y’s value is Equation 1

-4x+7(5)=-5

-4x+35=-5

-4x=-40

Cancellation of negative sign on both sides

x=40/4

x=10

[x,y]=[10,5]

3 0
3 years ago
Can someone help me
grandymaker [24]
What is the answer or this.
5 0
3 years ago
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