问题
解答题
解方程
2x-2+1.8=3.6
7(x-1.2)=3.57.
答案
①2x-2+1.8=3.6
2x-0.2=3.6
2x+0.2-0.2=3.6+0.2
2x=3.8
2x÷2=3.8÷2
x=1.9
②7(x-1.2)=3.57
7(x-1.2)÷7=3.57÷7
x-1.2=0.51
x+1.2-1.2=1.2+0.51
x=1.71
解方程
2x-2+1.8=3.6
7(x-1.2)=3.57.
①2x-2+1.8=3.6
2x-0.2=3.6
2x+0.2-0.2=3.6+0.2
2x=3.8
2x÷2=3.8÷2
x=1.9
②7(x-1.2)=3.57
7(x-1.2)÷7=3.57÷7
x-1.2=0.51
x+1.2-1.2=1.2+0.51
x=1.71