(0.6+420)÷(x+20)=3
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(0.6+420)÷(x+20)=3
(0.6+420)÷(x+20)=3
(0.6+420)÷(x+20)=3
(0.6+420)÷(x+20)=3
420.6=3(x+20)
x+20=140.2
x=120.2
(0.6+420)÷(x+20)=3
(0.6+420)÷(x+20)=3
(0.6+420)÷(x+20)=3
(0.6+420)÷(x+20)=3
420.6=3(x+20)
x+20=140.2
x=120.2