Question

sendo a + b=18 e a\b = -8\17, calcule a.

Answer 1

a/b = -8/17 ↓

b/a = -17/8

b+a/a = -17+8/8

18/a = -9/8

-9a = 8.18

-9a = 144

a = 144/-9

a = -16