Question

tim x 

42:x+36:x=66

90:x-48:x=3

Answer 1

a)  (42+36):x=66

78:x=66

x=78:66

x=13/11

b)  90:x-48:x=3

(90-48):x=3

42:x=3

x=42:3

x= 14

Answer 2

a) 42:x+36:x=66

42.1/x+36.1/x=66

1/x.(42+36)=66

1/x=11/13

x=1:11/13

x=13/11

b) 90:x-48:x=3

90.1/x-48.1/x=3

1/x(90-48)=3

1/x=1/14

x=14

Answer 3

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