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

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answers:
no sea nabo say: 3x+4x+5x=(3+4+5)x=(12)x
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Engr. Ronald say: Just add all those like terms.

3x + 4x + 5x = 12x answer
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David say: They add up to 12x when simplified
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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.
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Como say: --

3x + 4x + 5x = 12x
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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.
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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
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Hi say: 12x
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ted s say: try listening , reading, & doing your homework
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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.
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ahmedmohamed say: ####
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Daniel say: That just be totalled to 12X
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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?
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Carl say: Have you read the text book? This is what it's for.
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sepia say: 12x
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Idealist say: 12x
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Mike G say: 12x
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