Brother and sister help with the equation, solve the equation, big brother and sister help me

15x+11y)*8-(15*

120x+88y)-(3x+

120x+114x+

Because x+y=15, x=15-y

Substitute as above.

114x+114(15-y)+

1710-114y+

So y=-55, so x=70

x+y=15 ..1

15x+11y)*8-(15*

From the formula 2 x+y=15:

120x+ =3382

114x + obtained by the formula: x=15-y generation 3:

114（15-y)+

1710-114y+

y=-55 gives y=-55 generation 1 as: x=15-(-55)=70, so x=70, y=-55

15x+11y)*8-(15*

120x+114x+ ⑴

and x+y=15, so 114x+114y=1710 - get y=-55

Substituting 114x-6270=1710 x=70, so x=70 y=-55

x=70y=-55.

The process is as follows: 2 formula can be simplified to, 15*x+11*y=445

The result is obtained by solving a system of binary linear equations.

3x = 27/2

x = 9/2

Ratio: The inward product is equal to the outward product.

Solution: Remove the denominator to get:

x-1）^2 -4=x^2-1

x^2-2x+1-4=x^2-1

2x-2=0

x=1 cold cherry blossoms are warm.

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x -1 can be decomposed into (x+1) (x-1).

Multiply by (x+1) (x-1) at the same time.

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