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malfutka [58]
3 years ago
7

Reminder: variables are on both sides

Mathematics
1 answer:
yarga [219]3 years ago
8 0
Start by multiplying both sides of the equation by 7 (the common denominator).

7 \left(\frac{6z}{7} -27 \right)=7\left(\frac{21-4z}{7} \right) \\ 6z-189=21-4z

Add 4z to both sides.

10z-189=21

Add 189.

10z=210 \\ z=21
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