Question

Determine o valor de
a) 3/5.x = 1

b) 4/7.x = 1

c) 0,75.x = 1

d) 2,5.x = 1

Answer 1

a) 3/5.x = 1
x = 1.5/3
x = 5/3

b) 4/7.x = 1
x = 1.7/4
x = 7/4

c) 0,75.x = 1
75/100.x = 1
x = 1.100/75
x = 100/75 (÷5)
x = 20/15 (÷5)
x = 4/3

d) 2,5.x = 1
25/10.x = 1
x = 1.10/25
x = 10/25 (÷5)
x = 2/5