Question

3. 21 - 3 (x - 7) = x + 20​

Answer 1

$\purple{\huge{\bold{\mathcal{Answer}}}}$

$21 - (x - 7) = x + 20 \\ 21 - x + 7 = x + 20 \\ 28 - x = x + 20 \\ 28 - 20 = x + x \\ 8 = 2 x$

$\orange{\huge{\bold{\boxed{\mathcal{x=4}}}}}$

Answer 2

that's your answer buddy

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HOPE THIS HELPS....