Question

Find the value of the unknown variable
PLEASE GIVE AN STEP BY STEP explanation
$a + \frac{1}{7} = \frac{3}{7}$
$z + 7 = 20$
$w + 8 = 68$
$b - 3 = 11$
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Answer 1

Step-by-step explanation:

a+⅐=3/7

a=3/7–1/7

a=2/7

z+7=20

z=20–7

z=13

w+8=68

w=68–8

w=60

b–3=11

b=11+3

b=14