What is the answer to -0.4w=4.2 ?

The answer to -0.4w=4.2 is w=-21/2

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-0.4w=4.2

- 0.4 w = 4.2

w = - \frac{21}{2}

Decimal Notation

w = - 10.5

Solution steps

- 0.4 w = 4.2

Multiply both sides by

10

- 4 w = 42

Divide both sides by

- 4

w = - \frac{21}{2}

4 x + 5 = 2 x + 1

- 6 p + 7 = 3 (2 p - 3) - 4 (- 10 + 4 p)

\frac{2 x + 3}{5} + x = 2

3 + 5 n = 1 + 8 n + 2

2 x = 2 (x - 3)