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kaiteDID
Group Title
Solve the following equation. Then place the correct number in the box provided.
3 x  = 8
x = or x =
 2 years ago
 2 years ago
kaiteDID Group Title
Solve the following equation. Then place the correct number in the box provided. 3 x  = 8 x = or x =
 2 years ago
 2 years ago

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geoffb Group TitleBest ResponseYou've already chosen the best response.1
Implicit in the way they ask you to put your answer, you know there will be two solutions. Do you know what the vertical bars (  ) stand for?
 2 years ago

mtmb11 Group TitleBest ResponseYou've already chosen the best response.1
11 and 5 i think
 2 years ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
The vertical bars mean absolute value. When you're evaluating the expression, positive is positive and negative is positive. So, if I want to know x, then answer is 10 if x is 10 *or* 10.
 2 years ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.0
In x = A, you have x= A if x is positive. You have x = A if x is negative. The second consideration is resolved by a double negative.
 2 years ago

mtmb11 Group TitleBest ResponseYou've already chosen the best response.1
o well i was wrong
 2 years ago

geoffb Group TitleBest ResponseYou've already chosen the best response.1
@mtmb11 No you weren't.
 2 years ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.0
So, if 3x is positive, you have the equation 3  x = 8 and then you solve that. If 3x is negative, you have (3  x) = 8 or x  3 = 8, and then you solve that one. You will have both as answers.
 2 years ago

mtmb11 Group TitleBest ResponseYou've already chosen the best response.1
yay i was correct
 2 years ago

mtmb11 Group TitleBest ResponseYou've already chosen the best response.1
how do i make my numbers go up on this account like right now i have 20
 2 years ago

tcarroll010 Group TitleBest ResponseYou've already chosen the best response.0
So, do you understand now how you have to set up 2 equations? one for the positive and one for the negative.
 2 years ago
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