问题
解答题
解方程.
|
答案
(1)65×0.3-7X=10.4,
19.5-7X=10.4,
19.5-7X+7X=10.4+7X,
7X+10.4=19.5,
7X+10.4-10.4=19.5-10.4,
7X=9.1,
7X÷7=9.1÷7,
X=1.3;
(2)1.2×X=144,
1.2×X÷1.2=144÷1.2,
x=120.
解方程.
|
(1)65×0.3-7X=10.4,
19.5-7X=10.4,
19.5-7X+7X=10.4+7X,
7X+10.4=19.5,
7X+10.4-10.4=19.5-10.4,
7X=9.1,
7X÷7=9.1÷7,
X=1.3;
(2)1.2×X=144,
1.2×X÷1.2=144÷1.2,
x=120.