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2 years ago

Y = - 2x + 1 2x - 2y = 4 Solve systems of equations by substitutions

Mathematics

1 answer:

astraxan [27]2 years ago

6 0

Answer:

x= 1

y= -1

Step-by-step explanation:

y=-2x+1

2x-2y=4

substitute for y

2x-2(-2x+1)=4

reduce

2x+4x-2=4

6x=6

x=1

y= -2(1)+1

y= -1

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Answer:

$\dfrac{149}{40}$

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Step-by-step explanation:

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$(-\dfrac{6}{4} + \dfrac{3}{2}) + (\dfrac{6}{5} + \dfrac{4}{3}) =$

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1 year ago

Ten less than five times a number is less than six times the number decreased by eight

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10 - 5x < 6x - 8

We can treat this inequality like a normal algebraic equation.

Add 5x to both sides

10 < 11x - 8

Add 8 to both sides

18 < 11x

Divide both sides by 11

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X is greater than the value 1.64.

Let's plug the number 2 into each value of x to verify.

10 - 5x < 6x - 8

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It's correct.

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