Solve for z
z = \frac{20}{9} = 2\frac{2}{9} \approx 2.222222222
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9z+1=3\left(2\times 3+1\right)
Multiply both sides of the equation by 9, the least common multiple of 9,3.
9z+1=3\left(6+1\right)
Multiply 2 and 3 to get 6.
9z+1=3\times 7
Add 6 and 1 to get 7.
9z+1=21
Multiply 3 and 7 to get 21.
9z=21-1
Subtract 1 from both sides.
9z=20
Subtract 1 from 21 to get 20.
z=\frac{20}{9}
Divide both sides by 9.
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