What is the answer to 9=-7/10 a-12 ?

The answer to 9=-7/10 a-12 is a=-30

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9=-7/10 a-12

9 = - \frac{7}{10} a - 12

a = - 30

Solution steps

9 = - \frac{7}{10} a - 12

Switch sides

- \frac{7}{10} a - 12 = 9

Move

12

to the right side

- \frac{7}{10} a = 21

Multiply both sides by

10

- 7 a = 210

Divide both sides by

- 7

a = - 30

\frac{5 r}{2} - 6 = 19

r, r - rs = 2 rs + 5

3 x - 8 (2 x + 3) = - 6 (2 x + 5)

20 + \frac{2}{9} a = 38

3 (x + 1) + 4 (x - 3) = 47