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OpenStudy (anonymous):
5(2+4z)=85
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OpenStudy (anonymous):
10 +20z =85. So z= 75/20 = 3.75
OpenStudy (anonymous):
5(2+4z)=85 10+20z=85 20z=85-10 20z=75 20z/20= 75/20 z=3.75
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