solve 2x+y=12 x+2y=9
Answers
Answered by
27
Step-by-step explanation:
Step-by-step explanation:
Step-by-step explanation:
Here,
By substitution method,
let,
2x + y = 12 .....1st equation
x + 2y = 9
x = 9 - 2y..........2nd equation
then,
putting value of x in 1st equation,
2( 9 - 2y ) + y = 12
18 - 4y + y = 12
18 -3y = 12
18 -12 = 3y
6 = 3y
y = 6/3= 2
Also,
substituting the valve of y in 1st equation,
2x + y = 12
2x + 2 = 12
2x = 10
x = 10 /2= 5
Hence,
X = 5
Y = 2 answer
Answered by
2
2 x + y = 12
x + 2 y = 9
x =9–2 y
2(9–2 y)+ y = 12
18–4 y + y = 12
18–3 y = 12
-3 y =12- 18 =- 6
y =-6/-3 = 2
2 x+ y = 12
2 x +2 = 12
2 x = 12–2 =10
x =10/2 = 5
x = 5, y =2
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