SOLUTION: 7) y=6-x 2x-3y=22 13) 4x+5y=5 6x+7y=7 15) x+9y=4 2x+3y=7

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Question 110097This question is from textbook algebra 1
: 7)
y=6-x
2x-3y=22

13)
4x+5y=5
6x+7y=7

15)
x+9y=4
2x+3y=7 This question is from textbook algebra 1

Answer by MathLover1(20850) (Show Source):
You can put this solution on YOUR website!
7)
.....substitute in second expression

....move to the right

..divide both sides by

now find

13)
....both sides multiply by
....both sides multiply by

......now add them

then find

........since is , then

15)
...both sides in this equation multiply by

....... add both equations

then find

...
...
...
.........move to the right