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jj2cool101
Group Title
What is the value of the x variable in the solution to the following system of equations?
7x  2y = 21
4x + y = 57
21
21
9
9
 2 years ago
 2 years ago
jj2cool101 Group Title
What is the value of the x variable in the solution to the following system of equations? 7x  2y = 21 4x + y = 57 21 21 9 9
 2 years ago
 2 years ago

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jj2cool101 Group TitleBest ResponseYou've already chosen the best response.0
help.... :=(
 2 years ago

jj2cool101 Group TitleBest ResponseYou've already chosen the best response.0
can you help me ?
 2 years ago

JoãoVitorMC Group TitleBest ResponseYou've already chosen the best response.1
sure, i will calculate here
 2 years ago

jj2cool101 Group TitleBest ResponseYou've already chosen the best response.0
its negative right
 2 years ago

JoãoVitorMC Group TitleBest ResponseYou've already chosen the best response.1
7x  2y = 21 > eq.[1] 4x + y = 57 > eq.[2]
 2 years ago

JoãoVitorMC Group TitleBest ResponseYou've already chosen the best response.1
from eq.[2] we have y = 57  4x. substitute it in eq.[1] we have: 7x 2(57 4x) = 21 7x 144 +8x =21 15x = 135 x =9
 2 years ago

jj2cool101 Group TitleBest ResponseYou've already chosen the best response.0
oh thanks i was using another meathod
 2 years ago
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