Solve for x 3x-7y=4 x+7y=16

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Algebra

$3 x - 7 y = 4$ $x + 7 y = 16$

The simplified system is the arbitrary solution of the original system of equations.

$y = - \frac{4}{7} + \frac{3 x}{7}$

$y = \frac{16}{7} - \frac{x}{7}$

Simplify the right side.

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Reorder $- \frac{4}{7}$ and $\frac{3 x}{7}$ .

$y = \frac{3 x}{7} - \frac{4}{7}$

$y = \frac{16}{7} - \frac{x}{7}$

$y = \frac{3 x}{7} - \frac{4}{7}$

$y = \frac{16}{7} - \frac{x}{7}$

Simplify the right side.

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Reorder $\frac{16}{7}$ and $- \frac{x}{7}$ .

$y = - \frac{x}{7} + \frac{16}{7}$

$y = \frac{3 x}{7} - \frac{4}{7}$

$y = - \frac{x}{7} + \frac{16}{7}$

$y = \frac{3 x}{7} - \frac{4}{7}$

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Name

Name	one billion three hundred seventy-seven million one hundred sixty-five thousand two hundred eighty-six

Interesting facts

1377165286 has 16 divisors, whose sum is 2698119936
The reverse of 1377165286 is 6825617731
Previous prime number is 7

Basic properties

Is Prime? no
Number parity even
Number length 10
Sum of Digits 46
Digital Root 1

Name

Name	one billion one hundred sixty-eight million four hundred fifteen thousand one hundred sixteen

Interesting facts

1168415116 has 16 divisors, whose sum is 2867928120
The reverse of 1168415116 is 6115148611
Previous prime number is 11

Basic properties

Is Prime? no
Number parity even
Number length 10
Sum of Digits 34
Digital Root 7

Name

Name	nine hundred eighteen million eight hundred twelve thousand six hundred ninety-seven

Interesting facts

918812697 has 32 divisors, whose sum is 1410048000
The reverse of 918812697 is 796218819
Previous prime number is 509

Basic properties

Is Prime? no
Number parity odd
Number length 9
Sum of Digits 51
Digital Root 6

Factor x^2-4

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Factor 4x^2+8x