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Algebra 8 Online
OpenStudy (anonymous):

6.4+2.1(z-2)=8.5

OpenStudy (anonymous):

Distribute the 2.1 6.4+2.1z-4.2=8.5 6.4+2.1z=12.7

OpenStudy (anonymous):

6.4+2.1z-4.2=8.5 2.1z-4.2=2.1 2.1z=6.3 z=3

OpenStudy (anonymous):

Subtract the 6.4 both sides 2.1z=6.3 Divide by 2.1 both sides z= 3

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