当x取何值时,式子1/2[2x-1/3(10-70)]-x/2的值比式子1/3[x-1/2(x+1)]的值小3?

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当x取何值时,式子1/2[2x-1/3(10-70)]-x/2的值比式子1/3[x-1/2(x+1)]的值小3?当x取何值时,式子1/2[2x-1/3(10-70)]-x/2的值比式子1/3[x-1/

当x取何值时,式子1/2[2x-1/3(10-70)]-x/2的值比式子1/3[x-1/2(x+1)]的值小3?
当x取何值时,式子1/2[2x-1/3(10-70)]-x/2的值比式子1/3[x-1/2(x+1)]的值小3?

当x取何值时,式子1/2[2x-1/3(10-70)]-x/2的值比式子1/3[x-1/2(x+1)]的值小3?
由题意(1/2)[2x - (1/3)(10 - 70)] - x/2 = (1/3)[x - (1/2)(x + 1)] - 3,即(1/2)(2x + 20) - x/2 = (1/3)(x/2 - 1/2) - 3,即x + 10 - x/2 = x/6 - 1/6 - 3,移项可得x/3 = -79/6,因此x = -79/2 ；综上所述,所求x = -79/2 .