问题
解答题
解方程:
6x+x=421.2x-x=0.965y-3.7=8.57a+3×4=40.
答案
6x+x=42,
7x=42,
7x÷7=42÷7,
x=6;
1.2x-x=0.96,
0.2 x=4.8,
0.2x×5=4.8×5,
x=24;
5y-3.7=8.5,
5y-3.7+3.7=8.5+3.7,
5y=12.2,
5y÷5=12.2÷5,
y=2.44;
7a+3×4=40,
7a+12=40,
7a+12-12=40-12,
7a=28,
7a÷7=28÷7,
a=4.