(2000-x+240)×2-(x-160)=20

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(2000-x+240)×2-(x-160)=20
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(2000-x+240)×2-(x-160)=20
(2000-x+240)×2-(x-160)=20

(2000-x+240)×2-(x-160)=20
(2000-x+240)×2-(x-160)=20
(2240-x)×2-(x-160)=20
4480-2x-x+160=20
4640-3x=20
3x=4640-20=4620
x=4620÷3=1540

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(2000-x+240)×2-(x-160)=20
4000-2x+480-x+160-20=0
-3x=-4620
x=1540

4000-2x+480-x+160=20
4640-20=3x
x=4620/3
x=1540

4000-2X+480-X+160-20=0
3X=4620
X=1540

4000-2X+480-X+160=20
4640-3x=20
-3x=-4620
x=1540

4000-2x+480-x+160=20
-3x=-4620
x=1540