9=7z-13z-21 please show correct step by step thank youu!

Answers

9 = 7z −13z −21 Step 1: Simplify both sides of the equation. 9 = 7z −13z −21 9 = 7z + −13z + −21 9 = (7z +−13z ) +(−21 ) (Combine Like Terms) 9 = −6z +−21 9 = −6z −21 Step 2: Flip the equation. −6z −21  = 9 Step 3: Add 21 to both sides .−6z −21 +21  = 9+21 −6z  = 30 Step 4: Divide both sides by -6 .−6z/ −6  = 30/−6 z = −5


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