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OpenStudy (anonymous):
true or false? In order to solve a system of equation by substitution, you MUST always solve for y in one of the equations and hen back-substitute
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OpenStudy (anonymous):
True
OpenStudy (anonymous):
because for example if you have to unknowns and two equations, ex: y=x+5 and the other says x=y-6.....then you would have to back substitue the y=x+5 into the value for y in the second equation.
OpenStudy (anonymous):
|dw:1330406766557:dw|
OpenStudy (anonymous):
then just solve for x
OpenStudy (anonymous):
thank you i understand now
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OpenStudy (anonymous):
|dw:1330406799210:dw|
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