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OpenStudy (anonymous):
PLZ HELP Equation A: y = x + 1 Equation B: y = 4x + 5 Which of the following steps can be used to find the solution to the set of equations? x + 1 = 4x + 5 x = 4x + 5 x + 1 = 4x x + 5 = 4x + 1
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OpenStudy (anonymous):
@JoannaBlackwelder
OpenStudy (joannablackwelder):
Any thoughts?
OpenStudy (anonymous):
not really I'm so confused
OpenStudy (joannablackwelder):
Ok, they are using the method of substitution.
OpenStudy (anonymous):
ok
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OpenStudy (joannablackwelder):
That is where you solve for a variable and plug it into that variable in the other equation.
OpenStudy (joannablackwelder):
Both of these equations are already solved for y.
OpenStudy (joannablackwelder):
So, we can take what y= in one equation, and plug it in for y in the other equation.
OpenStudy (joannablackwelder):
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