Question

tìm x biết : x+23=56

x+1223=45

ai nhanh mk tk 

ai tk mk mk tk lại 

Answer 1

* x+23=56

     x   =56-23

     x   =33

* x+1223=45

x           =45-1223

x           =-1178

Answer 2

x + 23 = 56

\(\Leftrightarrow\)x = 56 - 23 = 33

x + 1223 = 45

\(\Leftrightarrow\)x = 45 - 1223 = -1178

Answer 3

x1=33

x2=-1178

Answer 4

a) x+23=56

x=56-23

x=33

b)