Use addition or substitution to find the value of x for this set of equations. top line y = x - 2 bottom line 7y - 4x = 10
Use addition or substitution to find the value of x for this set of equations. top line y = x - 2 bottom line 7y - 4x = 10
since we have y = x - 2 , we can use substitution method. Let's replace y, in second equation by (x-2)
7(x-2) - 4x = 10 ---> 7x - 14 -4x = 10 ----> 3x = 14 + 10
3x = 24
x = 8
Now, in first equation, let's replace "x" by 8 ---> y=8-2=6
The answer is the pair of numbers (8,6)