Answer:
5
Explanation:
(x :5) ×4 =80 :(5 ×4)
(x :5) ×4 =80 :20
(x :5) ×4 =4
x :5 =4 :4
x:5 =1
x=1 ×5
x =5
(x÷5)*4=80÷(5*4)
(x÷5)*4 = 80÷20
(x÷5)*4 = 4
x÷5 = 4÷4
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