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san4es73 [151]
4 years ago
13

-2(-3x+5y)+3(-4+2y)?????????

Mathematics
2 answers:
Alex4 years ago
7 0
My best guess would be 6x-4y-12
4 is negative and 12 is negative
Tatiana [17]4 years ago
4 0

Regroup terms

-2(-3x + 5y) + 3(2y - 4)

Expand

6x - 10y + 6y - 12

Collect like terms

6x + (-10y + 6y) - 12

Simplify

6x - 4y - 12

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Read 2 more answers
F=5/9c+32<br> Solve for c
arsen [322]
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4 0
3 years ago
10x + 3y = 19<br> y = 2x + 5
sleet_krkn [62]

Answer:

x = 1/4

y = 5 2/4

Step-by-step explanation:

Given two equations

1. 10x + 3y = 19

2. y = 2x + 5

Substitute 2x + 5 for y in the first equation

We have

10x + 3y = 19

10x + 3(2x + 5) = 19

Expand the bracket

10x + 3 X 2x + 3 X 5 = 19

10x + 6x + 15 = 19

16x + 15 = 19

Subtract 15 from both sides to eliminate 15 on the left

16x + 15 - 15 = 19 - 15

16x = 4

Divide both sides by 16 to isolate x

16x/16 = 4/16

x = 1/4

Now, substitute 1/4 for x in either equation to get y.

Using equation 2 , we have

y = 2x + 5

= 2(1/4) + 5

= 2/4 + 5

LCM of the denominator is 4.

Divide the LCM by the denominators and multiply the results by the numerators. Also, the LCM becomes the denominator of the results

Therefore

= 2 + 20/4

= 22/4

y= 5 2/4

x = 1/4 , y = 5 2/4

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3 years ago
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Answer:

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Step-by-step explanation:

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Answer:

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Step-by-step explanation:

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