lvasquev462
Algebra 1 help
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siegel
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Ok, what do you need?
lvasquev462
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ok i have 7x - 9 - 2x = 10 - 3x + 5 Solve
siegel
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well, you combine like terms, so what are the like terms?
lvasquev462
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the x es
lvasquev462
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9x right
siegel
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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?
lvasquev462
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-5x
siegel
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close, let's just look at the cooeficients,
7+(-2)
lvasquev462
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5
siegel
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right, now what are the like terms on the right side of the equation.
lvasquev462
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nothing just the 3x right
siegel
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well a like term does not have to contain a variable
siegel
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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
lvasquev462
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oh ok
siegel
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is that too confusing?
lvasquev462
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yeah kinda but i can go through it
lvasquev462
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so it will be 15 right
siegel
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right , so what is the equation with the combined like terms
lvasquev462
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would it be x= 3
siegel
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slow down, just put in what you said were like terms
lvasquev462
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5x and 15