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OpenStudy (anonymous):
z -1 5 ----- = ----- z+4 7
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OpenStudy (anonymous):
solve for z
OpenStudy (anonymous):
cross multiplying gives (z-1)7 = 5(z + 4) 7z -7 = 5z +20 7z - 2z =20 + 7 2z = 27 z = 27/2
OpenStudy (anonymous):
thanks again
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