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olchik [2.2K]
3 years ago
10

Y=4x-9 y=x-3 solve by substitution

Mathematics
2 answers:
Arisa [49]3 years ago
7 0

Answer:

x=2

Step-by-step explanation:

x-3=4x-9

x=4x-6

-3x=-6

x=2

taurus [48]3 years ago
5 0

Answer:

x = 2 y = -1

Step-by-step explanation:

let y = 4x -9 .................. eqn 1

y = x - 3 ........................... eqn 2

substitute for y = x - 3 in eqn 1

we have ,

y = 4x -9.................... eqn 1

i.e

x - 3 = 4x - 9

collect the like terms

-3 + 9 = 4x - x

6 = 3x

divie both sides by 3

x = 2

now put x = 2 in equation (2)

from

y = x - 3 .............eqn 2

y = 2 - 3

y = -1

therefore x = 2 y = -1

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The money used in Saudi Arabia is the Riyal.The exchange rate is 4 Riyals to 1 dollar. How many Riyals would you receive if you
inysia [295]

Answer:

20 Riyals you receive if you exchange 5 dollars .

Step-by-step explanation:

As given

The money used in Saudi Arabia is the Riyal.

The exchange rate is 4 Riyals to 1 dollar.

i.e

4 Riyals = 1 dollar.

Now calculate for 5 dollars.

5 × 4 Riyals = 5 × 1 dollars

20  Riyals = 5 dollars

Therefore 20 Riyals you receive if you exchange 5 dollars .


5 0
3 years ago
The ages of Jamal, Wesley, an John are consecutive integers.the sum of thier ages is 108.what are thier ages .
hodyreva [135]

Answer:

Step-by-step explanation:

We have three people

jamal = x (since im guessing hes the youngest)

wesley= x+1

John= x+2

the formula you would use is x+x+1+x+2=108

when you simplify that you get 3X+3=108

you subtract the 3 from 108 which leaves you with 3X=105

divide that by 3 which makes x=35

so

jamal is 35

wesley is 36

john is 37

3 0
2 years ago
Does anyone know this because clearly i dont
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I think it’s either A or C
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Step-by-step explanation:

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