Question

2x + 3y = 15.5
x + y = 6

Answer 1

X= 2.5 Y= 3.5

Explanation:

2X+3Y =15.5

replace either x or y with your second equation

(2*(6-y))+3y=15.5

now you only have one variable

12-2y+3y=15.5

y=3.5

now insert your y value into the second equation provided

x+y=6

x+3.5=6

so x= 2.5

you can check your answer by inserting these numbers into the equations and it should work

Answer 2

Explanation:

2x+3y=15.5 --- ①

x+y=6 --- ②

y=6-x --- ③

substitute ③ into ①

2x+3(6-x)=15.5

2x+18-3x=15.5

-x+18=15.5

18-15.5=x

x=2.5

y=6-x

y=6-2.5

y=3.5

hope this helps