Question

If 4x -7=21, the value of 3x -2 is...Who will answer I will mark him brainleast answer...!!​

Answer 1

★ Answer -

• The value of 3x - 2 is equal to 19.

★ To find -

• The value of 3x - 2.

★ Step-by-step explanation -

• Before finding the value of 3x - 2, we have to find the value of "x" using the equation (4x - 7 = 21) given to us. Then we can substitute the value of "x" in the given algebraic expression and solve it to find out our answer!

$\implies \sf4x - 7 = 21$

$\implies \sf4x = 21 + 7$

$\implies \sf4x = 28$

$\implies \sf x = \cancel{\dfrac{28}{4}}$

$\implies \underline{\boxed{\sf x = 7}} \: \bigstar$

Now, substituting the value of x -

$\longmapsto \bf3x - 2$

$\longmapsto \bf3 \times 7 - 2$

$\longmapsto \bf21 - 2$

$\longmapsto \underline{\boxed{\bf19}} \: \bigstar$

Thus -

• The value of 3x - 2 is 19.

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Answer 2

Question :-

• If 4x -7=21, the value of 3x -2 is..

To Find :-

• Value of 3x - 2

Solution :-

⟹ 4x - 7 = 21

⟹ 4x = 21 + 7

⟹ 4x = 28

⟹ x = 28/4

⟹ x = 7

Now,

⟹ 3x -2

⟹ 3 × 7 -2

⟹ 21 - 2

⟹ 19

Hence,

• The value of 3x - 2 is 19

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