How to Solve y=x-4 and y=4x-10 by substitution

Algebra
Tutor: None Selected Time limit: 1 Day

y=x-4

Y=4x-10

Nov 13th, 2014

To solve by substitution, you can substitute y = x - 4 into the second equation:

y = 4x - 10

x - 4 = 4x - 10  (substitute x-4 in for y)

-4 = 3x - 10 (subtract x from both sides)

6 = 3x  (Add 10 to both sides)

x = 2 (Divide by 3 on both sides)

And you're done! :)

Nov 13th, 2014

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