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30=-9+7(z+2)
We move all terms to the left:
30-(-9+7(z+2))=0
We calculate terms in parentheses: -(-9+7(z+2)), so:We get rid of parentheses
-9+7(z+2)
determiningTheFunctionDomain 7(z+2)-9
We multiply parentheses
7z+14-9
We add all the numbers together, and all the variables
7z+5
Back to the equation:
-(7z+5)
-7z-5+30=0
We add all the numbers together, and all the variables
-7z+25=0
We move all terms containing z to the left, all other terms to the right
-7z=-25
z=-25/-7
z=3+4/7
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