(1-25%)x=36

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(1-25%)x=36

(1-25%)x=36
(1-25%)x=36

(1-25%)x=36
(1-25%)x=36
x=36/0.75
=48

x=48

(1-25%)x=36
75%x=36
x=36÷75%
x=48

(1-1/4)x=36
3x/4=36
x=36*4/3
x=48

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