Question

the solution of the eqaution is 7(x-1)=21​

Answer 1

Answer:

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7

7

7

to both sides of the equation

7

−

7

=

2

1

7x-7=21

7x−7=21

7

−

7

+

7

=

2

1

+

7

7x-7+{\color{#c92786}{7}}=21+{\color{#c92786}{7}}

7x−7+7=21+7

3

Simplify

Add the numbers

Add the numbers

7

=

2

8

Answer 2

Given :

7(x - 1) = 21.

To Solve :

• Distribute.
• Add 7 to Both Sides of the Equation.
• Simplify.
• Divide Both Sides of the equation by the Same Term.
• Again Simplify.

Solution :

$\Large\ → 7 (x - 1) = 21$

$\Large\ → 7x - 7 = 21$

$\Large\ → 7x - 7 + 7 = 21 + 7$

So Now add the Numbers...

$\Large\ → 7x = 28$

$\Large\ → \frac{ 7x}{7} = \frac{28}{7}$

Simplify :

$\Large\ → x = 7.$

∴ The root of the equation 7(x-1)=21 is

The root of the equation 7(x-1)=21 isHence the root of the equation is 4.