Question

4 x + 2 Y + 3 X + Y = 21 then what will be the X and Y

Answer 1

7x+3y =21 (equation1)t
4x+3y=11 as given in your last question (equation2)

substracting eq 2 from eq 1
7x+3y -(4x+3y)=21-11
7x+3y-4x-3y= 10

7x-4×=10
x=10/3

,
putting value of excess 10/3 in equation 1 7×10/3+3y=21
70/3+3y=21
$\frac{70 + 9y = 63}{3}$
70+9y=63
70-63=9y
7/9=y