how do you work these out?
1) 1/8a - 6 = 1
2)x/4 + 7= 2
3)-10=9k-40
$$\\\frac{1a}{8} - 6 = 1 \\\\ \frac{1a}{8} - 6+6 = 1+6 \\\\ \frac{1a}{8} = 7 \\\\ \frac{1a}{8}\times 8 = 7 \times 8\\\\ 1a=56\\\\ a=56$$
