Question

plzzzz answer a, c, d, e and f
thank you...

Answer 1

Answer:

GIVEN BELOW

Step-by-step explanation:

Given To Find Value of 'X' in following

(a) 7x + 2 = -19

From here

Taking +2 from LHS to RHS we have

> 7x = -19 - 2

= 7x = -21

= -3 (we took 7 from LHS to RHS to obtain X)

Therefore

$\boxed{\mathsf{ X = -3}}$

(c) 5x - 4 = 21

From here

Taking -4 from LHS to RHS we have

> 5x = 21 + 4

= 5x = 25

= 5 (we took 5 from LHS to RHS to obtain X)

Therefore

$\boxed{\mathsf{ X = 5}}$

(d) -7x = 21

From here

Taking -7 from LHS to RHS we have

$\mathsf{x = \dfrac{21}{-7}}$

> x = -3

Therefore

$\boxed{\mathsf{ X = -3}}$

(e) 18 - 7x = -3

From here

Taking +18 from LHS to RHS we have

-7x = -3 - 18

-7x = -21

> x = 3 (we took -7 from LHS to RHS to obtain X)

Therefore

$\boxed{\mathsf{ X = 3}}$

(f) 3(x + 4) = 21

For this we will first open the bracket

>> 3x + 12 = 21

Now taking +12 from LHS to RHS we have

> 3x = 9

$\mathsf{ x = \dfrac{9}{3} = 3}$ (we took -7 from LHS to RHS to obtain X)

Therefore

$\boxed{\mathsf{ X = 3}}$

Points To remember

While moving a term from LHS TO RHS the Sign of the term gets reversed

Like --

'+' will become ' - '

'×' will become ' ÷ '

and Vice - versa

Thanks mate