Question

1 Find the value of the unknown variable.
a) z + 7 = 20
b) w + 8 = 68​

Answer 1

Answer:

$\huge\bold\red{AnsWer}$

$a) \: z + 7= 20 \\ = z = 20 - 7 \\ = z = 13$

$b) \: w + 8 = 68 \\ = w = 68 - 8 \\ = w = 60$