Question

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

Answer 1

$7+2x+6x=63 \\ 2x+6x=63-7 \\ 8x = 56 \\ x= \frac{56}{8} \\ x = 7$

Answer 2

7+8x=63
8x=63-7
8x=56
x=56/8
x=7
Verificare:
7+2*7+6*7=7+14+42=63