Question

B. Answer the following questions
(a) If x + 5 = 7, then 2x - 3 = ?
(b) What is the solution of the equation 5x + 5 = - 407
(c) If 0.5y = 1.5, find y.
(d) Check if p = 4 is the solution
x + 2.4
3, then find
2
p 4 or +3-7
bure linear equations.​

Answer 1

a) x = 2

b) x = 82.24

c) y = 3

Given :-

a) x + 5 = 7 , then 2x - 3 = ?

b) solution of 5x + 5 = - 407

c) 0.5y = 1.5 , y = ?

Solution :-

a) x + 5 = 7 , then 2x - 3 = ?

x + 5 = 7

x = 7 - 5

x = 2

Substitute x in 2x - 3

2x - 3 = ?

2(2) - 3 = ?

4 - 3 = 1

_____________________________

b) solution of the equation 5x + 5 = -407

5x + 5 = -407

5x = -407 - 5

5x = - 412

$x = \frac{ - 412}{5}$

x = 82.24

______________________________

c) 0.5y = 1.5 , y = ?

$0.5y = 1.5 \\ y = \frac{1.5}{0.5 } \\ y = 3$

______________________________

Answer 2

a) x = 2

b) x = 82.24

c) y = 3

Given :-

a) x + 5 = 7 , then 2x - 3 = ?

b) solution of 5x + 5 = - 407

c) 0.5y = 1.5 , y = ?

Solution :-

a) x + 5 = 7 , then 2x - 3 = ?

x + 5 = 7

x = 7 - 5

x = 2

Substitute x in 2x - 3

2x - 3 = ?

2(2) - 3 = ?

4 - 3 = 1

_____________________________

b) solution of the equation 5x + 5 = -407

5x + 5 = -407

5x = -407 - 5

5x = - 412

$x = \frac{ - 412}{5}$

x = 82.24

______________________________

c) 0.5y = 1.5 , y = ?

$0.5y = 1.5 \\ y = \frac{1.5}{0.5 } \\ y = 3$

______________________________