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For the following system, if you isolated y in the first equation to use the Substitution Method, what expression would you substitute into the second equation?
4x − y = 8
2x + 3y = 9
8 − 4x
8 + 4x
−8 + 4x
−8 − 4x
 9 months ago
 9 months ago
Please help. I will fan and give medal to whoever succeeds in helping me. For the following system, if you isolated y in the first equation to use the Substitution Method, what expression would you substitute into the second equation? 4x − y = 8 2x + 3y = 9 8 − 4x 8 + 4x −8 + 4x −8 − 4x
 9 months ago
 9 months ago

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SA5UK3Best ResponseYou've already chosen the best response.1
y = 84x So when you switch the negative what happens?
 9 months ago

AcnologiaBest ResponseYou've already chosen the best response.0
I'm not sure what you mean by "switch the negative".
 9 months ago

warningiflirtBest ResponseYou've already chosen the best response.1
do the opposite sign so 8= 8
 9 months ago

SA5UK3Best ResponseYou've already chosen the best response.1
When you divide out the negative what happens to (84x)
 9 months ago

warningiflirtBest ResponseYou've already chosen the best response.1
so what is the opposite of 4 ?
 9 months ago

SA5UK3Best ResponseYou've already chosen the best response.1
Yep @warningiflirt is right. 1 means the opposite. So take the opposite of 84x
 9 months ago

warningiflirtBest ResponseYou've already chosen the best response.1
so you have −8 + 4x
 9 months ago

warningiflirtBest ResponseYou've already chosen the best response.1
see how I did that?
 9 months ago

SA5UK3Best ResponseYou've already chosen the best response.1
y = (8 4x) y = (84x) If you know how to distribute it makes it y = 8 + 4x
 9 months ago
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