What is the answer to 42=3(-4a)+6 ?

The answer to 42=3(-4a)+6 is a=-3

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42=3(-4a)+6

42 = 3 (- 4 a) + 6

a = - 3

Solution steps

42 = 3 (- 4 a) + 6

Switch sides

3 (- 4 a) + 6 = 42

Remove parentheses:

(- a) = - a

- 3 \cdot 4 a + 6 = 42

Multiply the numbers:

3 \cdot 4 = 12

- 12 a + 6 = 42

Move

6

to the right side

- 12 a = 36

Divide both sides by

- 12

a = - 3

5 - 2 x = 1

\frac{x}{6} = - 9

9 - 2 x = 3 x - 1

x, \frac{6 x - 1}{y} - 3 = 2

3 (w + 6) = 42