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MATH SOLVE
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9=7z-13z-21 please show correct step by step thank youu!
5 months ago
Q:
9=7z-13z-21 please show correct step by step thank youu!
Accepted Solution
A:
9 =Β 7zβ13zβ21
Step 1: Simplify both sides of the equation.
9 =Β 7zβ13zβ21
9 =Β 7z+β13z+β21
9 =Β (7z+β13z)+(β21)(Combine Like Terms)
9 =Β β6z+β219 =Β β6zβ21
Step 2: Flip the equation.
β6zβ21Β = 9
Step 3: Add 21 to both sides
.β6zβ21+21Β =Β 9+21
β6zΒ = 30
Step 4: Divide both sides by -6
.β6z/β6Β =Β 30/β6
z =Β β5