Question

Solve 7+7a=7(2-b) for b

Answer 1

b = 1 - a

Explanation:

Given

7 + 7a = 7(2 - b) ← divide both sides by 7

1 + a = 2 - b ( subtract 2 from both sides )

- 1 + a = - b ( multiply through by - 1 )

1 - a = b

Answer 2

`b = (a - 1)`

Explanation:

Question

`7 + 7a = 7(2 - b)`

First Solve the brackets

`7 + 7a = 7(2 - b) \\ 7 + 7a = 14 - 7b`

Then Make the b as the Subject

`7 + 7a = 14 - 7b \\7 + 7a - 14 = 7b \\ 7a - 7 = 7b \\ 7(a - 1) = 7b \\ (7(a - 1))/(7) = (7b)/(7) \\ a - 1 = b`

hope this helps you.

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