anonymous
  • anonymous
Algebra 1 help
Mathematics
schrodinger
  • schrodinger
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anonymous
  • anonymous
Ok, what do you need?
anonymous
  • anonymous
ok i have 7x - 9 - 2x = 10 - 3x + 5 Solve
anonymous
  • anonymous
well, you combine like terms, so what are the like terms?

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anonymous
  • anonymous
the x es
anonymous
  • anonymous
9x right
anonymous
  • anonymous
well let's look at it (7x)+(- 9)+(- 2x) = (10)+(- 3x)+(5) you know that subtraction is adding a negative, so what is the sum of the like terms on the left side of the equation?
anonymous
  • anonymous
-5x
anonymous
  • anonymous
close, let's just look at the cooeficients, 7+(-2)
anonymous
  • anonymous
5
anonymous
  • anonymous
right, now what are the like terms on the right side of the equation.
anonymous
  • anonymous
nothing just the 3x right
anonymous
  • anonymous
well a like term does not have to contain a variable
anonymous
  • anonymous
so 10 and 5 are like terms because they don't have variables. like terms have the same variable, it could be x or nothing at all. x^2 and x are not like terms, but 4x^2 and 8x^2 are, and 3x and 6x are. at the same time 3 and 9 are like terms in an equation
anonymous
  • anonymous
oh ok
anonymous
  • anonymous
is that too confusing?
anonymous
  • anonymous
yeah kinda but i can go through it
anonymous
  • anonymous
so it will be 15 right
anonymous
  • anonymous
right , so what is the equation with the combined like terms
anonymous
  • anonymous
would it be x= 3
anonymous
  • anonymous
slow down, just put in what you said were like terms
anonymous
  • anonymous
5x and 15

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