How do you solve #-2z - 9= 7- 10z#?

1 Answer
smendyka
Nov 18, 2016

#z = 2#

Explanation:

Step 1) Isolate all terms containing #z# on one side of the equation and all constants on the other side of the equation while keeping the equation balanced:

#-2z - 9 + 9 + 10z = 7 - 10z + 9 + 10z#

#-2z + 10z = 7 + 9#

Step 2) Combine like terms and solve for #z# while keeping the equation balanced:

#8z = 16#

#(8z)/8 = 16/8#

#z = 2#

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