Question

Z - 3/7 =4 solve z please

Answer 1

>>>
`\sf{ (31)/(7) }`

Explanation:

Given Equation ,

• 
  `\sf{z - (3)/(7) = 4}`

We have to find ,

• Value of z

Solution :

`\implies \: \: \: \sf{z - (3)/(7) = 4}`

Step 1 : Adding 3/7 to both sides :

`\implies \: \: \: \sf{z - \cancel{ (3)/(7) }+ \cancel{ (3)/(7) } = 4 + (3)/(7) }`

We get ,

`\implies \: \: \: \sf{z = 4 + (3)/(7) }`

Step 2 : Simplifying Right Hand Side , by taking LCM :

`\implies \: \: \: \sf{z = (28 + 3)/(7) }`

We get ,

`\implies \: \: \: \underline{ \boxed{\sf{ \bold{z = (31)/(7) }}} } \: \: \: \bigstar`

• Therefore, value of z is "31/7"

Verification :

→
`\sf{z - (3)/(7) = 4}`

Substituting value of z :

→
`\sf{ (31)/(7) - (3)/(7) = 4}`

→
`\sf{ (28)/(7) = 4}`

→
`\sf{4= 4}`

→ LHS = RHS

→ Hence, Verified

• Therefore, we can say that our answer is correct :)

Answer 2

• 
  `(31)/(7) \\`

Given :

• 
  `z - (3)/(7) = 4 \\`

To find :

• Value of z

Solution :

• 
  `z - (3)/(7) = 4 \\`
• 
  `(7z - 3)/(7) = 4 \\`
• 
  `7z - 3 = 7 * 4`
• 
  `7z = 28 + 3`
• 
  `7z = 31`
• 
  `z = (31)/(7) \\`

Thus, z = 31/7.