在括号里填上适当的数,使每个方程的解都是 x = 5( )+ x =13 x - ( )=2.3( )× x = 7 x ÷ ( )= 5

问题描述:

在括号里填上适当的数,使每个方程的解都是 x = 5
( )+ x =13 x - ( )=2.3
( )× x = 7 x ÷ ( )= 5

8,
2.7
7/5
1

8,2.7,7/5,1

(8)+ x =13 x - (2.7)=2.3
(1.4)× x = 7 x ÷ (1)= 5

( 8 )+ x =13 x - ( 7.3 )=2.3
( 1.4 )× x = 7 x ÷ (1 )= 5