How do you solve #-15z + 20z + 5z - - 4z = - 14#?

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Answer 1 · 2017-10-27T14:21:23

#z = - 7/22#

#15z + 20z + 5z - - 4z = - 14#

Before simplifying, note that #- -# is same thing as #+ (- xx - = +)#

#15z + 20z + 5z + 4z = - 14#

#44z = -14#

Divide both sides by #44#

#(44z)/44 = (-14)/44#

#cancel(44z)/cancel44 = (-14)/44#

#z = - cancel(14)^7/cancel(44)^22#

#z = - 7/22#