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Anvisha [2.4K]
3 years ago
13

Ill give brainliest

Mathematics
1 answer:
andreev551 [17]3 years ago
8 0

First, make sure that all the variables are in one side. The first equation is gonna be x-y=3

Second, we are going to eliminate the y because it is much easier, but you can also eliminate the x

We have to add both equation because the y in the first equation is negative and in the second equation it’s positive.

We are left with 3x=9

Therefore, x=3

Last, substitute x= 3 in one of the equations

Y=6

P.O.I is (3,6)

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algol13
Answer C is correct.
3 0
3 years ago
4x-29=5x-9 What is the answer to this, I keep getting -20 and i feel like thats wrong. (solve for x)
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4 years ago
Need help asap
goblinko [34]

Answer:

b. 7x3 + 9x2 - 3x - 8

Step-by-step explanation:

Write the problem as a mathematical expression.

(4x3+6x2+2x−3)+(3x3+3x2−5x−5)

Remove parentheses.

4x3+6x2+2x−3+3x3+3x2−5x−5

Add 4x3

and 3x3

.

7x3+6x2+2x−3+3x2−5x−5

Add 6x2

and 3x2

.

7x3+9x2+2x−3−5x−5

Subtract 5x

from 2x

.

7x3+9x2−3x−3−5

Subtract 5

from −3

.

7x3+9x2−3x−8

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3 years ago
How many liters each of a 10% acid solution and a 80% acid solution must be used to produce 70 liters of a 65% acid solution?
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Assume you need x liters 10% acid, y liters 80% acid

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NEED HELP ASAP 30 POINTS
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