Question

Description :
From the table, choose any one item from
each column to form an equation and
solve it.
Form at least 30 equations
One example is done for you. The items chosen
in this case are underlined in the table
$- 21a + ( - 3 \5) = 21 \\ = - 21a = 21 - \frac{3}{5} \\ = - 21a = \frac{105 - 3}{5} \\ = - 21a = \frac{102}{5} \\ a = - \frac{34}{34}$
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Answer 1

Answer:

i don't know this answer