5:(3x_1)=1:4
[tex]\frac{5}{3x-1}[/tex] = [tex]\frac{1}{4}[/tex]
=> 5 × 4 = 3x-1
=> 3x-1 = 20
=> 3x = 20+1
=> 3x = 21
=> x = [tex]\frac{21}{3}[/tex]
=> x = 7
[tex]\\\\\\[/tex]
HOPE IT HELPS
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