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Rezolvati in multimea N:a)7X+1=4X+37...help...me coroana!!.

Răspuns :

7x+1=4x+37
7x-4x=37-1
3x=36
x=12
7x+1=4x+37
7x4x=37-1
7×4×=36÷7
×4×=9
x=9:4
×=2