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Dahasolnce [82]
3 years ago
5

3(x+y)=7(y-x), 5(3x-y)=x+3​

Mathematics
2 answers:
Natasha_Volkova [10]3 years ago
8 0
3(x+y) = 7(y-x)
3x+3y = 7y-7x
3x+7x +3y -7y = 0
10x - 5y = 0 —> *7
70x-35y = 0

5(3x-y)=x+3
15x-y =x+3
15x-x-y = 3
14x -y = 3 —>*5
70x-5y =15

70x-70x-5y-(-35y) = 15
30y = 15
y = 1/2

-2.5 +10x = 0
10x = 2.5
x = 0.25



hram777 [196]3 years ago
4 0

Answer:

i am not sure thi sis the first one

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ANTONII [103]

Answer:

$92.60

Step-by-step explanation:

7($5.99) + 7($6.49)=$41.93

$41.93 + $45.43  = $87.36

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7 0
3 years ago
Solve the equation x³ − 5 = 59
In-s [12.5K]

Answer:

4 = x

Step-by-step explanation:

x³ - 5 = 59     Add five to both sides of the equation.

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3 0
3 years ago
If m < 0 and b > 0, the graph of y = mx + b does not pass through which quadrant?
stiks02 [169]

Answer:

Quadrant III


Step-by-step explanation:

The attached picture shows graph of 4 such linear functions with the conditions given in the problem. ALL of them DO NOT pass through Quadrant III.

The graphs shown are of the functions:

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y=-3x+3

y=-x+0.5

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8 0
3 years ago
Read 2 more answers
In the problem 100 divided by 25 equals 4 the the what is 100
Mekhanik [1.2K]

Answer:

<em>Dividend</em>

Step-by-step explanation:

Dividend is a number that is to be divides by other.

So 100 is a dividend.

25:

A divisor.

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6 0
3 years ago
2х + Зу = 5<br> у= 5 - x <br> also need method
pav-90 [236]

Answer:

x=10, y=-5

Step-by-step explanation:

2x+3y=5, y= 5-x; change y to 5-x:

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=>y=5-x=5-10=-5

4 0
3 years ago
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