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(2x/3)+(x/2)+(x/7)+x=33 そうなの? x*[(2/3)+(1/2)+(1/7)+1]=33 x*(2*2*7+3*7+6+2*3*7)/(2*3*7)=33 x*(28+21+42)/42=33 x=33*42/91=198/13
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