(3 Marks) 7) a) A bike shop only stocks road bikes or mountain bikes. In July the ratio of road
bikes sold to mountain bikes sold is 3:5. The owner then sells more road bikes but no
more mountain bikes and the ratio changes to 2:1. What is the minimum amount of
road bikes that the shop could have sold?

step-by-step explanation:

subtract 7, so the answer is x < = 3, or c.

answer are

step-by-step explanation:

1) the property is   ixi = a ⇔x = a   o x = -a

4(x-5)+3= 15⇒4x-20+3 = 15⇒4x-17= 15⇒4x = 15+17⇒4x = 32⇒x =32/4= 8

4(x-5) +3= -15⇒4x-20 +3 = -15⇒4x-17= -15⇒4x =-15+17⇒4x = 2⇒x =2/4= 1/2

the values are x =8 and x = 0,5