Topic: Which one is correct?

[[AK47]M4lysz]

mooman has spoken. case closed.

[[MAF]Agus]

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

problems, mathematicians? :7

division by 0 on last line


the answer to the first question is 9 because you do multiplication before division

? but if you do multiplicacion before division then it's 1

or I didn't get it

[[MAF]Epoxi]

BIDMAS Convention - Brackets, Index, Division, Multiplication, Addition, Subtraction in that order.

Therefore the answer is 9.

6/2*(1+2)
Brackets
6/2*3
Division
3*3
Multiplication
9

[b00tsyou]

/ and * are on same level

6*4/2 = 24/2 = 12 = 6*2 =12 = 4/2*6 = 6/2*4 = 1/2*6*4

same with + and -  are on same level

only () can change priority

() > ^ > * and / > + and -     priority order where ^ is exp e.g. :  2^3 = 2*2*2  or 2^(1/2) = 2^0.5 = racine square(2) or 2^(-3 ) = 1/2^3 = 1/8 = 0.125           2^(1/3) = cubic racine(2) .....



here

answer is 9 ofc

and 2(a-x) = a-x

1st : a=x => a-x =0

2(a-x) = 2*0

2*0 = 0 : brillant ^^
0=0

[some_punk]

this is an example, in what case u need to cross the multiplication or division

2a = 3(4/15)

2a = 3(4/15)  ** then the 3 turns in 3/1

2a = 3/1 * 4/15  ** do the fractions multiplication

2a = 12/15   ** then the 2(a) or 2*a turns in a division            ***multiplication to division  = divison to multiplication

a = 12/15  / 2   ** then the 2 turns in 2/1

a =  12/15 / 2/1

a = 12/30   ** simplificated = 4/10
 
final result  is    a = 4/10

Checkout

2 (4/10) = 3 (4/15)

2/1 * 4/10 = 3/1 * 4/15

8/10 = 12/15  ** correct

0.8 = 0.8 ** correct

now lets go to your "simple operation"

6 / 2 (1+2) = x    ** make ur parenthesis

6 / 2 (3) = x   ** turn the parenthesis in a multiplication

6 / 2 * 3 = x   ** do the multiplication

6 / 6 = x  ** a number divided by itself is equal to one

1 = x  ** correct

[ToasterMan]

9 is correct