【12÷(x-6)×3/10-9】+1900=1981,求x是多少?

问题描述:

【12÷(x-6)×3/10-9】+1900=1981,求x是多少?

【12÷(x-6)×3/10-9】+1900=1981 12÷(x-6)×3/10-9=81 12÷(x-6)×3/10=90 x-6=1/25 x= 156/25