How do you evaluate $18 - [12 \div (15 \div (8 - 7 - 4)) + 6}$ $18- [ 12\div ( 15\div ( 8- 7- 4) ) + 6\}$ ?

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Answer 1 · 2017-02-02T01:51:00

$14.4$ $14.4$

Remember: PEMDAS

Start with $(8 - 7 - 4) = - 3$ $(8-7-4) = -3$

The expression would look like: $18 -$ $18 -$ [ $12 \div (15 \div - 3) + 6]$ $12 divide (15 divide -3) + 6]$

2nd: $15$ $15$ divided by $- 3$ $-3$ is $\frac{15}{- 3} = - 5$ $15/-3=-5$

The expression would look like: $18 -$ $18 -$ [ $12 \div - 5 + 6]$ $12 divide -5 + 6]$

3rd: $12$ $12$ divided by $- 5$ $-5$ is $\frac{12}{- 5} = - 2.4$ $12/-5=-2.4$

4th: $- 2.4 + 6 = 3.6$ $-2.4 + 6 = 3.6$

The expression would look like: $18 - 3.6$ $18 - 3.6$

5th: $18 - 3.6 = 14.4$ $18 - 3.6 = 14.4$

How do you evaluate 18−[12÷(15÷(8−7−4))+6}18- [ 12\div ( 15\div ( 8- 7- 4) ) + 6\}?