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Elis [28]
3 years ago
12

Solve the system using elimination: Help me please12x - 8y = -12 6x + 4y = -30

Mathematics
1 answer:
LUCKY_DIMON [66]3 years ago
4 0

12x - 8y = -12  

6x + 4y = -30

Multiply the 2nd equation by 2, to make the Y coefficients opposite:

6x + 4y = -30 x 2 = 12x + 8y = -60

Now add the two equations:

12x -8y = -12 + 12x +8y = -60

=  24x = -72

Divide bothe sides by 24 to solve for x:

x = -72/24

x = -3

Now replace x with -3 in the first equation to solve for y:

12(-3) - 8y = -12

-36 - 8y = -12

Add 36 to each side:

-8y = 24

Divide both sides by -8 to solve for y:

y = 24 / -8

y = -3

X = -3 and y = -3

(-3,-3)

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3 years ago
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sergij07 [2.7K]

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3 years ago
Multiply the polynomials (5x^2+4x-4)(4x^3-2x+6)<br> Explain your steps!!
Lapatulllka [165]
So distribute using distributive property
a(b+c)=ab+ac so

split it up
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group like terms
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the asnwer is 20x^5+16x^4-26x^3+22x^2+32x-24




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3 years ago
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