(7-h)/(h-1)=-1/4 Mohon sama caranya ya :3

(7-h) / (h-1) = - 1/4
4(7-h) = -(h-1)
28 - 8h = 1 - h
28 - 1 = 8h - h
27 = 7h
3,86 = h

[tex] \frac{7-h}{h-1} =- \frac{1}{4} \\ 4(7-h)=-1(h-1) \\ 28-4h=-h+1 \\ 28-1=4h-h \\ 27=3h \\ h= \frac{27}{3} \\ h=9[/tex]