Question

By what number (-9)power -1 should be multiplied, so that the product may be equal to(-12)power-1

Answer 1

X. * (-9)^-1 = (-12)^-1
X/-9 = 1/-12
X/9 = 1/12
12X = 9
X = 3/4

Answer 2

${ -9}^{ -1} \ \times x = - 12 { }^{ - 1} \\ x = \frac{ - 9}{ - 12} \\ x = \frac{3}{4}$