Question

a= | -21+18 |
b= -1.a
c= -3b
d= c: (-9)

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Answer 1

Respuesta:

$a = | - 21 + 18| \\ a = | - 3| \\ a = 3$

$b = - 1a \\ - a$

$c = - 3b \\ - 3b = c \\ b = - \frac{1}{3}c$

$d = c \div ( - 9) \\ d = - \frac{1}{9} c$