Question

math hindi
1. निम्नलिखित समीकरणों को हल कीजिए ।

$A.) 2( x + 4) = 12$

$B). 3(n - 5) = 21$

$C). - 4(2 + x) = 8$
$D). 4(2 - x) = 8$
​

Answer 1

Step-by-step explanation:

$x = 2$

$n = 12$

$x = - 4$

$x = 0$

answer s

Answer 2

$\huge\frak{\underline{\underline{प्रश्न:}}}$

1. निम्नलिखित समीकरणों को हल कीजिए ।

• 2( x + 4) = 12
• 3(n - 5) = 21
• -4(2 + x) = 8
• 4(2 - x) = 8

$\huge\frak{\underline{\underline{उत्तर:}}}$

$\rule{400}4$

• 2 ( x + 4 ) = 12

$\huge{\boxed{\red{x\:=\:2.}}}$

$\large\bold{Explanation:}$

⠀⠀$\implies$ 2 ( x + 4 ) = 12

⠀⠀$\implies$ (2 × x) + (2 × 4) = 12.

⠀⠀$\implies$ 2x + 8 = 12.

⠀⠀$\implies$ 2x = 12 - 8.

⠀⠀$\implies$ 2x = 4

⠀⠀$\implies$ x = 4/2

⠀⠀$\implies$ x = 2.

$\rule{400}4$

• 3 ( n - 5) = 21

$\huge{\boxed{\red{x\:=\:18.}}}$

$\large\bold{Explanation:}$

⠀⠀$\implies$ 3 ( n - 5 ) = 21

⠀⠀$\implies$ ( 3 × n ) - ( 3 × 5) = 21

⠀⠀$\implies$ 3n - 15 = 21

⠀⠀$\implies$ 3n = 21 + 15

⠀⠀$\implies$ 3n = 36

⠀⠀$\implies$ n = 36/3

⠀⠀$\implies$ n = 18

$\rule{400}4$

• -4 ( 2 + x ) = 8

$\huge{\boxed{\red{x\:=\:-4.}}}$

$\large\bold{Explanation:}$

⠀⠀$\implies$ -4 ( 2 + x ) = 8

⠀⠀$\implies$ (-4 × 2) + (-4 × x ) = 8

⠀⠀$\implies$ -8 + (-4x) = 8

⠀⠀$\implies$ -4x = 8 + 8

⠀⠀$\implies$ -4x = 16

⠀⠀$\implies$ x = 16/-4

⠀⠀$\implies$ x = -4

$\rule{400}4$

• 4 ( 2 - x ) = 8

$\huge{\boxed{\red{x\:=\:0}}}$

$\large\bold{Explanation:}$

⠀⠀$\implies$ 4 ( 2 - x ) = 8

⠀⠀$\implies$ ( 2 - x ) = 8/4

⠀⠀$\implies$ ( 2 - x ) = 2

⠀⠀$\implies$ -x = 2 - 2

⠀⠀$\implies$ -x = 0

$\rule{400}4$

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