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Fofino [41]
3 years ago
6

Solve the system by elimination. -6x + y = 0 9x - 8y = 4

Mathematics
1 answer:
mixas84 [53]3 years ago
3 0

Answer:

(4, 4 )

Step-by-step explanation:

Given the 2 equations

- 6x + 6y = 0 → (1)

9x - 8y = 4 → (2)

Multiplying (1) by 3 and (2) by 2 and adding will eliminate the x- term, that is

- 18x + 18y = 0 → (3)

18x - 16y = 8 → (4)

Add (3) and (4) term by term to eliminate x, then

2y = 8 ( divide both sides by 2 )

y = 4

substitute y = 4 into either of the 2 equations and solve for x

Substituting into (2)

9x - 8(4) = 4

9x - 32 = 4 ( add 32 to both sides )

9x = 36 ( divide both sides by 9 )

x = 4

Solution is (4, 4 )

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Find the x plz help
MArishka [77]

Answer:

x=50

Step-by-step explanation:

To find the angle on the bottom left you would subtract 180-149 and get 31.

Then you would add 31 and 99 to get 130.

Then subtract 180-130 to get x=50 because all triangles equal 180 if you add all of the angles together.

3 0
3 years ago
WILL GIVE 20 POINTS TO THE BRAINLIEST ANSWER
Shalnov [3]

Answer:

1. 16x-188

2. 5x-90

Step-by-step explanation:

1.

9x-8+7x-y=180

y=9x-8+7x-180=16x-188

2.

2x-y+3x=90

y=5x-90

4 0
3 years ago
Four times the sum of three consecutive integers is 156.Write and solve an equation that will find the smallest integer.
Burka [1]

Answer:

4(x+x+1+x+2)=156, x=12

Step-by-step explanation:

let the numbers be x, x+1 and x+2.

Now,

4(x+x+1+x+2)=156

4(3x+3)=156

divide both side by 4

3x+3=156/4=39

subtract 3 from both sides

3x=39-3

3x=36

divide both sides by 3

x=36/3=12

x=12

Hence, the smallest of the integers is 12.

3 0
3 years ago
2x=4 so what does 3x=<br> ?
NeTakaya

Answer:

6

Step-by-step explanation:

2x =4

x=4:2 =2

3x =3 ×2 =6

3 0
3 years ago
Read 2 more answers
Solve (u+6)^2+4=52 , where u is a real number.
Ugo [173]

Answer:

The value of u are,

0.93, -12.93

Step-by-step explanation:

It is given an expression in variable u

(u + 6² + 4 = 52

<u>To find the solution of given expression</u>

(u + 6)·² + 4 = 52

(u + 6)²  = 52 - 4

(u + 6)² = 48

u + 6 = √48

u + 6 = ±6.93

u =  ±6.93 - 6

u = 6.93 - 6  or u = -6.93 - 6

u = 0.93 or u = -12.93

3 0
3 years ago
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