Question

$\frac{-3}{4} = \frac{b}{15}$

Answer 1

4b = -45
b = -45/4
b = -11,25

Answer 2

$\frac{-3}{4}= \frac{b}{15} multiplica cruzado -3.15=4b -45=4B B=-45/4 B=-11,25   Resposta: B= -11,25$