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 one year ago
use the elimination method to solve the system of equations.
a+7b=7
a+2b=3
 one year ago
use the elimination method to solve the system of equations. a+7b=7 a+2b=3

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hartnn
 one year ago
Best ResponseYou've already chosen the best response.1subtract the 2 equations, what u get ?

Jasmineplayhouse
 one year ago
Best ResponseYou've already chosen the best response.0I am sorry don't understand

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1let me give you an example on how to subtract equations, let the 2 equation be say, 2x+3y =7 2x3y =2 now if i subtract the 1st equation from 2nd equation, i get (2x3y)  (2x+3y) = 27 so, 2x2x3y3y=5 06y=5 so, y = 5/6 in same manner, you try for your question of a+7b=7 a+2b=3

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1very close,but its 7b2b = 7(3) can you proceed ?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.172 = 5 7 (3) = 7+3 =10 _

hartnn
 one year ago
Best ResponseYou've already chosen the best response.17b2b = 7(3) 5b = 10 b=10/5 = 2 got this ?

Jasmineplayhouse
 one year ago
Best ResponseYou've already chosen the best response.0still confused

Jasmineplayhouse
 one year ago
Best ResponseYou've already chosen the best response.07(3) since it has a minus sign in front i believed it was to be subtracted not added.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1 *  = + so, 7  (3) became 7+3

Jasmineplayhouse
 one year ago
Best ResponseYou've already chosen the best response.0ok now i understand

Jasmineplayhouse
 one year ago
Best ResponseYou've already chosen the best response.0so the final answer would be 2

hartnn
 one year ago
Best ResponseYou've already chosen the best response.1b=2 you still need to find 'a' put b=2 in any 1 of the original equation to get a

kelliegirl33
 one year ago
Best ResponseYou've already chosen the best response.0multiply the first equation by a 1. Doing this will cancel out the a's. You can then solve for b. Once you have solved b, substitute that in for b in either of the original equations and you will solve a. You can then check your answer by subbing in known variables in either of the original equations and if they equal, your answers are correct :)
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