问题
解答题
解方程. ①
②23+3x=41.6 |
答案
①
-5 6x
=7,3 4x
-10 12x
=7,9 12x
=7,1 12x
×12x=7×12x,1 12x
84x=1,
84x÷84=1÷84,
x=
;1 84
②23+3x=41.6,
23+3x-23=41.6-23,
3x=18.6,
3x÷3=18.6÷3,
x=6.2.
解方程. ①
②23+3x=41.6 |
①
-5 6x
=7,3 4x
-10 12x
=7,9 12x
=7,1 12x
×12x=7×12x,1 12x
84x=1,
84x÷84=1÷84,
x=
;1 84
②23+3x=41.6,
23+3x-23=41.6-23,
3x=18.6,
3x÷3=18.6÷3,
x=6.2.