Question

Solve the following system of equations graphically
x + 3y = 6, 2x - 3y =12 and hence find the value of a if 4x + 3y = a​

Answer 1

Explanation:

x + 3y = 6. 1)

2x - 3y = 12. 2)

add eqn 1 and 2

x + 3y = 6

+ 2x - 3y = 12

3x. = 18

x = 18/3

x = 6

put x = 6 in eqn 1

x + 3y =6

6 + 3y = 6

3y =6-6

3y = 0

y = 0/3

y = 0

put value of x and y in eqn

4x + 3y = a

4(6)+ 3(0) = a

24 + 0 = a

24 = a

a= 24

hope it's help u