Question 262535: ned help on algebra involving substitution x=y+4
-x+2y=7 Found 2 solutions by drk, dabanfield:Answer by drk(1908) (Show Source):
You can put this solution on YOUR website! we are given
(i)
(ii)
step 1 - where you see x in (ii) put the x stuff from (i) to get
(iii)
step 2 - solve for y.
combine like terms on the left to get
(iv)
add 4 to get
(v)
Since y = 11, we can find x as
So, our answer is (x,y) = (15,11).
You can put this solution on YOUR website! ned help on algebra involving substitution x=y+4
-x+2y=7
1.) x = y + 4
2.) -x + 2y = 7
Substitute y + 4 for x from equation 1.) in equation 2.):
-(y + 4) + 2y = 7
-y - 4 + 2y = 7
Solve the above for y then calculate x from 1.) as y + 4
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