9(x+2.7)=75.6 要清晰的步骤和说明.
问题描述:
9(x+2.7)=75.6 要清晰的步骤和说明.
答
9(x+2.7)=75.6
x+2.7=75.6/9
x+2.7=8.4
x=8.4-2.7
x=5.7