Question

Help me with this math equation.
​

Answer 1

`{\boxed{\mathcal{\red{7\:y\:+\:21}}}}` ✔

Also,

The value of
`\sf\purple{` ✅

Step-by-step explanation:-

`7(y + 4) - 7 = 0 \\ ➪ \: 7 \: y + 28 - 7 = 0 \\ ➪ \: 7 \: y + 21 = 0 \\ ➪ \: 7 \: y = - 21 \\ ➪ \: y = ( - 21)/(7) \\ ➪ \: y = - 3`

To verify:-

`7 \: ( \: y + 4 \: ) - 7 = 0 \\ ⇢  \: 7 \: ( - 3 + 4) - 7 = 0 \\ ⇢ \:  7 \: (1) - 7 = 0 \\ ⇢ \:  7 - 7 = 0 \\ ⇢ \:   \: 0 = 0`

`\longrightarrow{\purple{L.H.S\:=R.H.S}}`

Hence Verified.

`\circ \: \: { \underline{ \boxed{ \sf{ \color{green}{Happy\:learning.}}}}}∘`

Answer 2

7y+21

Explanation:

7(y+4)-7

=7y+28-7

=7y+21