
Kenneth S. answered 12/17/16
Tutor
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Expert Help in Algebra/Trig/(Pre)calculus to Guarantee Success in 2018
1. Fix the problem, first, by appending the missing right parenthesis at the right end
2. Distribute the negative three onto both terms inside the parentheses
3. Collect like terms, arranging the constant-only term on the opposite side to where the variable term is
4. Divide the coefficient into both sides, so that you have z = something
You ought to memorize this set of ideas, inasmuch as they are essential to success in Algebra.