If f(x-1) = 2x - 3, find f( -3)

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Studying for PSAT/NMSQT, and this practice question popped up. Thank you for reminding me of how to do functions, and how this question worked, I now understand.

tank.
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Thanks, i'm learning math and English in one single video! Haha

benjaminruiz
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tysm!! this is 100% work even in hard question💕

alinezahra
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You saved me, thanks! Greetings from Turkey :)

aligursoy
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hi .. what do you call these type of problems. My daughter is working on similar problems, but with added difficulty. IF
f( (x-1)/3 ) = x +7, find f(x+1).. I used your concept by reversing the arithmetic that took place on x in the function so (x-1)/3, was reversed as (x*3)+1=3x+1.. then x on the right side of the problem was replaced by 3x+1. so f(x)= 3x+1+7 = 3x+8... now that I know f(x), I can find f(x-1), by replacing x with x-1, so I get, f(x-1)= 3(x-1)+8= 3x+5..
Did I do it right?

alneg
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Thank you so much for putting the solution!!

rutujavisale
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Hello I have a question what is f(x+h) but f(x)=3-x

ladiieeque
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what do you call this type of problem?

spero_spera
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Saludos desde Perú🇵🇪aunque sé el inglés básico pero entendí.

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