3x+4x+5x my teacher can't teach...?

answers:
no sea nabo say: 3x+4x+5x=(3+4+5)x=(12)x

Engr. Ronald say: Just add all those like terms.
3x + 4x + 5x = 12x answer

David say: They add up to 12x when simplified

Nzewi Ernest Kenechukwu say: 3x + 4x + 5x
In the expression above, x is a common algebraic term. Then, we factor out x, i.e.
3x + 4x + 5x
= (3 + 4 + 5)x
= (12)x
= 12 × x {from BODMAS}
= 12x ...Ans.

Como say: 
3x + 4x + 5x = 12x

Puzzling say: When you have like terms (e.g. the same variable and exponent, only differing in the coefficient), you just add those leading numbers together.
3x + 4x + 5x
= (3 + 4 + 5)x
= 12x
To think about intuitively, imagine x is the number of items in each box. You have 3 boxes + 4 boxes + 5 boxes = 12 boxes. Later, if we are told the number of items in each box (say, x=10) then we don't have to think 30 + 40 + 50. We just think 12 * 10 = 120 items.

Elaine say: The unknown variable, which in this case is x represents the same place value. The number tells you how many you have. Just as in Arithmetic you add and subtract the same place value you do the same in Algebra. You have to know that 23 = (2 X 10) + 3
Example 23 + 55 can be written as
(20 + 3) + ((50 + 5)
(20 + 50) + (3 + 5) = 70 + 8

Hi say: 12x

ted s say: try listening , reading, & doing your homework

billrussell42 say: it's just addition. Answer is 12x.
If you have 3 apples and someone gives you 4 more, and someone else give you 5 more, you have 12 apples.

ahmedmohamed say: ####

Daniel say: That just be totalled to 12X

Who say: if you put 3 apples into a bag, put another 4 in , then put another 5 in  how many apples you got in the bag now?

Carl say: Have you read the text book? This is what it's for.

sepia say: 12x

Idealist say: 12x

Mike G say: 12x
