Question

solve for x if 21+3(x-7) =x+20​

Answer 1

$\implies\sf \: 21 + 3(x - 7) = x + 20 \\ \\ \implies\sf \: \cancel{20} + 3x - 21 = x + \cancel{20} \\ \\ \implies\sf \: 2x = 21 \\ \\ \implies\sf \: x = \frac{21}{2}$

I hope it is helpful

Answer 2

To solve :

• 21 + 3(x – 7) = x + 20

Solution :

21 + 3(x – 7) = x + 20

➠ 21 + 3x – 21 = x + 20

➠ 3x = x + 20

➠ 3x – x = 20

➠ 2x = 20

➠ x = 20/2

➠ x = 10

∴ Required answer

• x = 10