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lovelycharm
 2 years ago
elimination 4x  7y = 3
x  7y = 15
lovelycharm
 2 years ago
elimination 4x  7y = 3 x  7y = 15

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mjr632
 2 years ago
Best ResponseYou've already chosen the best response.1Do you understand how to substitute?

mjr632
 2 years ago
Best ResponseYou've already chosen the best response.1Okay, firstly, you want one equation as either Y or X by itself.

mjr632
 2 years ago
Best ResponseYou've already chosen the best response.1If you do that part, i'll then explain the next step.

lovelycharm
 2 years ago
Best ResponseYou've already chosen the best response.0okay wat the next step

mjr632
 2 years ago
Best ResponseYou've already chosen the best response.1write the equation you've got for your isolated variable in here.

lovelycharm
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1360887641308:dw is that right how i solve for y

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0 7y +  7y is not zero and 4x + x is 5x

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0You need a variable to cross out when you add down. Try multiplying one of the equations by a certain number so that one variable crosses out when you add down.

lovelycharm
 2 years ago
Best ResponseYou've already chosen the best response.0could u show me the step please @Rachel98

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0Okay, here is an example problem I'll draw it.

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0Now see how none of the variables cross off? So I'm going to try multiplying the first equation by  1 and see what happens.

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0Now see if you add straight down a variable crosses off when you add down.  y and y can also be put as  1y and 1y. Look at the numbers  1 + 1 = 0, so that crosses off.

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0Now all we have to do is divide both sides by  1, so undo the multiplication

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0So we have our x value, now what about y? What we do is we plug in the x value (substitute 8 for x) in one of the original equations. In this case the bottom equation is easier to do this.

lovelycharm
 2 years ago
Best ResponseYou've already chosen the best response.0could u help me with my problem cuz i dont understand ur problem

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0See, in my problem how I multiplied one equation by  1? Try doing that with either one of your equations and then add down.

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0Remember, a negative * a negative is a positive.

Rachel98
 2 years ago
Best ResponseYou've already chosen the best response.0Did you get it? Give it a try. I'll check your answer and if you make a mistake I'll work through it for you.
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