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OpenStudy (anonymous):
Use addition or substitution to find the value of x for this set of equations. x - y = 120 x + y = 150
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OpenStudy (anonymous):
do we know what y is
OpenStudy (anonymous):
no
OpenStudy (smilewithmehun):
Add the two equations together for it to equal 2x=270 then divide by two x=135
OpenStudy (anonymous):
thanks
OpenStudy (smilewithmehun):
Your welcome :)
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OpenStudy (clalgee):
Welcome to Openstudy!
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