Question

hi
give me the answer​

Answer 1

Step-by-step explanation:

4 ) let ,

x = 1

y = 7 - 1 = 6

so, x = 1 and y = 6

let x = - 1

y = 7 + 1 = 8

so, x = -1 , y = 8

5). x = 0 and y = 2

equation = 5x + 3y = 6

according to equation

→ 5(0) + 3(2) = 6

→ 0 + 6 = 6

→ 6 = 6 , LHS = RHS

(0,2) satisfy the given equation.

6) equation a - b = -3

let a = 1

b = - 3 - 1 = -4

therefore , a = 1 and b = -4

let a = -1

b = - 3 + 1 = -2

therefore, a = -1 , b = -2

8) given,

→ Dx = 24

→ x = -3

→ D = 24/3 = 8

→ D = 8

therefore value of D is 8

9) let the book be x and pen be y

cost of book is 5 more than twice the cost of pen

so,

x = 2y + 5

hope this answer helps you dear