Question

If 3x-y=27 and 3x+y=243 then find x and y

Answer 1

Answer:

Step-by-step explanation:

Given,

3x - y = 27......(1)

3x + y = 243 (+).....(2)

__________

6x = 270

x = 45......(3)

Substituting eq (3) in eq (1)

3x - y = 27

=> 3(45) - y = 27

=> 135 - y = 27

=> -y = 27 - 135

=> -y = - 108

==> y = 108

Therefore,

x = 45

y = 108