2{3[4(5x-1)-8]-20}=1+7=8
问题描述:
2{3[4(5x-1)-8]-20}=1+7=8
答
2{3[4(5x-1)-8]-20}-7=1移项2{3[4(5x-1)-8]-20}=1+7=8两边除以23[4(5x-1)-8]-20=8÷2=4移项3[4(5x-1)-8]=4+20=24两边除以34(5x-1)-8=24÷3=8移项4(5x-1)=8+8=16两边除以45x-1=16÷4=4移...