solve -2(d+20)-8d=20

Question

solve and chek it.

Answer 1

- 2(d + 20) - 8d = 20

Combine the terms using distributive property.

- 2d - 40 - 8d = 20

Separate the variables and constants.

- 2d - 8d = 20 + 40

- 10d = 60

Divide each side by negitive 10.

- 10d/- 10 = 60/- 10

⇒ d = - 6.

Solution d = -6.

Check :

- 2((- 6) + 20) - 8(- 6) = 20

- 2(14) + 48 = 20

- 28 + 48 = 20

 20 = 20.

So,the solution of the system is true.