x-1.8=1/2x+0.

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x-1.8=1/2x+0.
x-1.8=1/2x+0.

x-1.8=1/2x+0.
x-1.8=1/2x+0.3
x-1.8=0.5x+0.3
x-0.5x=1.8+0.3
0.5x=2.1
x=4.2