х+(х+43)=215
Решите уравнением !
2x=215-43
2x=172
x=172/2
x=86
-----------------------
86+(86+43)=215
215=215
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х+(х+43)=215
2x=215-43
2x=172
x=172/2
x=86
-----------------------
86+(86+43)=215
215=215