Question

If 3 x + 2 y equal to 985 and 3 x minus 2 y equal to 473 what is the value of x y

Answer 1

look at the pic above

Answer 2

3x +2y = 985

3x-2y = 473

add both equation

6x = 1458

now x= 243

now put the value of x in equation 1

3*243 +2y = 985

2y = 985- 729

2y= 256

y= 128