Mathematics
abates30
2015-11-10 00:53:57
reminder: both sides have a variable
ANSWERS
ellenjatta
2015-11-10 06:01:27

z equals 21 in this one.

ChaseStep
2015-11-10 06:02:42

Since you have Two Fractions with the same Denominator, Then put them side to side so you can combine them.   6z/7 - (21-4z/7) =27 We will Combine the Fraction :   6z-(21-4z)/7 = 27  : 6z-21+4z/7 = 27  10z-21/7 = 27 By multiplying by 7 in both sides you get : 10z-21 = 189 By adding 21 in both sides you get : 10z = 210  Divide 10 : z=21  

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