What is the answer to -15/21 =(3n)/7 ?

The answer to -15/21 =(3n)/7 is n=-5/3

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-15/21 =(3n)/7

- \frac{15}{21} = \frac{3 n}{7}

n = - \frac{5}{3}

Decimal

n = - 1.66666 \dots

Solution steps

- \frac{15}{21} = \frac{3 n}{7}

Switch sides

\frac{3 n}{7} = - \frac{15}{21}

Cancel the common factor:

3

\frac{3 n}{7} = - \frac{5}{7}

Multiply both sides by

7

3 n = - 5

Divide both sides by

3

n = - \frac{5}{3}

\frac{4 - 2 z}{3} = \frac{3}{4} - \frac{5 z}{6}

- \frac{4}{11} z - \frac{2}{5} = - \frac{1}{2}

y, 7 x + 4 y = 28

y, - 7 x + 8 y = 25

13 + 7 x = 20 - 7 x