Solve the following equation: 7z + 15 = 3z – 13 - Vidyadip

Question

Solve the following equation: 7z + 15 = 3z – 13

✓

Answer

7z + 15 = 3z – 13
⇒ 7z + 15 - 3z = 3z - 13 - 3z (Subtracting 3z from both sides)
⇒ 4z + 15 = - 13
⇒ 4z + 15 - 15 = - 13 - 15 ...(Subtracting 15 from both sides)
⇒ 4z = - 28
$\Rightarrow \frac{4 z }{4}=\frac{-28}{4} \quad \ldots($ Dividing by 4$)$
⇒ z = - 7

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