Question

解方程1.5/[(50.4+15.6)x-23]=0.

Answer 1

层层剥笋(括号很多,要一层层去掉) 1.5/[(50.4+15.6)x-23]=0.15 所以(50.4+15.6)x-23=1.5/0.15=10 (50.4+15.6)x-23=10 (50.4+15.6)x=33 x=33/66=0.5, 代回原方程,分母不为0,等式成立,检验完毕 所以x=0.5