问题
解答题
解方程.
3x+20=53
0.8x-6=42.
答案
(1)3x+20=53,
3x+20-20=53-20,
3x=33,
3x÷3=33÷3,
x=11;
(2)0.8x-6=42,
0.8x-6+6=42+6,
0.8x÷0.8=48÷0.8,
x=60.
解方程.
3x+20=53
0.8x-6=42.
(1)3x+20=53,
3x+20-20=53-20,
3x=33,
3x÷3=33÷3,
x=11;
(2)0.8x-6=42,
0.8x-6+6=42+6,
0.8x÷0.8=48÷0.8,
x=60.