Question

Anyone up for this, 3x-y=12
x+3y=14 , solve by substitution.

Answer 1

first we find the value of y from eq. I
-y=12-3x so y=3x-12
now put this value in eq II... on putting we get
x+3(3x-12)=14
= x+9x-36=14
= 10x-36=14
= 10x=14+36
= 10x=50
= x=5
now put x=5 in eq I then we get
3x-y=12
= 3*5-y=12
= 15-y=12
=y= 15-12
=y=3
finally
x=5 & y=3

Answer 2

Definitely rates a good answer, am awarding a medal for this step by step lucid solution.

Answer 3

thanx dear i will be happy to solve more questions...

Answer 4

Thank you