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BEST RESPONSE WILL GET A MEDAL AND A FAN
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
 one year ago
 one year ago
BEST RESPONSE WILL GET A MEDAL AND A FAN 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
 one year ago
 one year ago

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jiteshmeghwal9Best ResponseYou've already chosen the best response.0
4xy=8 Add y both sides wht do u gt ?
 one year ago

jiteshmeghwal9Best ResponseYou've already chosen the best response.0
Adding y both sides 4xy+y=8+y 4x=8+y
 one year ago

jiteshmeghwal9Best ResponseYou've already chosen the best response.0
Gt it till right here ?
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
Actually what you are being asked to do is find an expression for y in terms of x, and substitute that into the second equation. So if your two equations are 4x − y = 8 2x + 3y = 9 Then from the first equation we have that y = 8  4x hence y = 8 + 4x or y= 4x  8 This is the expression you would substitute into the second equation, as in 2x + 3y = 9 thus 2x + 3(4x  8) = 9 Note the the question is NOT asking you to solve the equations. It is just asking you to find an expression for y from the first of each pair of equations which you would substitute into the second equation.
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
No 4x  y = 8 Hence y = 8  4x and thus y = (84x) y = 4x  8
 one year ago

helpasap111Best ResponseYou've already chosen the best response.0
but what if that isnt one of the choices
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
But it IS one of the choices.
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
4x  8 is equal to exactly one of these expressions: 8 − 4x 8 + 4x −8 + 4x −8 − 4x
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
4x  8 Can it be 8  4x, I don't think so, because if it were then 4x  8 = 8  4x = (4x  8)
 one year ago

JamesJBest ResponseYou've already chosen the best response.1
Remember that a + b = b + a. This is called the commutative property of addition. Hence 4x  8 = 8 + 4x
 one year ago
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