8x-(50-x)*3=180

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8x-(50-x)*3=1808x-(50-x)*3=1808x-(50-x)*3=1808x-(50-x)*3=1808x-(150-3x)=1808x-150+3x=18011x=330x=308

8x-(50-x)*3=180
8x-(50-x)*3=180

8x-(50-x)*3=180
8x-(50-x)*3=180
8x-(150-3x)=180
8x-150+3x=180
11x=330
x=30

8x-(50-x)*3=180
8x-150+3x=180
11x=330
x=30

x=30