Question
Find the value of each unknown:
13 – z = 8
13 – z = 8
✓
Answer
13 – z = 8
Subtract 13 from both sides
13 – z – 13 = 8 – 13
⇒ -z = -5
Divide both sides by -1
$\frac{-z}{-1}=\frac{-5}{-1}$
⇒ z = +5
Subtract 13 from both sides
13 – z – 13 = 8 – 13
⇒ -z = -5
Divide both sides by -1
$\frac{-z}{-1}=\frac{-5}{-1}$
⇒ z = +5
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