Brain Teaser: Solve These Mathematics Equations. - Education

Brain Teaser: Solve These Mathematics Equations. - Education - Nairaland

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Brain Teaser: Solve These Mathematics Equations. by DanceVille(op): 8:09pm On Feb 09, 2015

Solve these Equations.
2+3=8
3+7=27
4+5=32
5+8=60
6+7=72
7+8= huh

..

II. x+2xy=6. . . . .Equation1
x+3xy=5. . . . . .Equation2

Show your Workings please..

Re: Brain Teaser: Solve These Mathematics Equations. by DaZion(m): 8:11pm On Feb 09, 2015

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Re: Brain Teaser: Solve These Mathematics Equations. by DaZion(m): 8:13pm On Feb 09, 2015

I dey come Op.....
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Re: Brain Teaser: Solve These Mathematics Equations. by lodscott(m): 10:30pm On Apr 16, 2016

lol one year later.
I was bored
2+3=:8. (2x2) +(3x2) -2 = 8,

3+7=27. (3x3)+(7x3) -3 = 27,

4+5:=32. (4x4)+(5x4) -4 = 32,

to lazy to write,it works for the others aswell.

therefore;
7+8 = (7x7) +(8x7) -7 = 98
cheers

Re: Brain Teaser: Solve These Mathematics Equations. by lodscott(m): 10:50pm On Apr 16, 2016

DanceVille:
Solve these Equations.
2+3=8
3+7=27
4+5=32
5+8=60
6+7=72
7+8=..

II. x+2xy=6. . . . .Equation1
x+3xy=5. . . . . .Equation2

Show your Workings please..

number 2

x+3xy+1=6

x+3xy+1= x+2xy

x +3xy -x -2xy=-1

Xy =-1

x = -1/y....

in eq 2

-1/y +3(-1/y)y = 5

-1/y -3 =5

-1/y =8

y =-1/8

and x = -1/y

x = -1/(-1/ cool

x = 8

hence x=8 and y=-1/8

cross checking.

in eq1

8+2[ 8 / ( -1\ 8 ) ]=

8+2(-1) = 8-2 = 6

also

8 + 3[ 8 / ( -1\ 8 )=

8 + 3(-1) = 8-3 = 5

cheers

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