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7+2x+6x=63 trebuie explicat exercitiul


Răspuns :

[tex]7+2x+6x=63 \\ 2x+6x=63-7 \\ 8x = 56 \\ x= \frac{56}{8} \\ x = 7 [/tex]
7+8x=63
8x=63-7
8x=56
x=56/8
x=7
Verificare:
7+2*7+6*7=7+14+42=63