Question 790223
8x-9y=17
40x-45y=85 multiplied by 5
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7x+5y=2 To eliminate y you must multiply by 9 to make the two y's add to zero.
63+45y=18
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40x-45y=85
63x+45y=18
-----------add
103x = 103 making y disapear, leaving only x.
x=1
.
Ed