7x+9y=17 , 6y +9x=23 solve by elimination method

Please solve the problem by using substitution or elmination method
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1 Answer

line 1: 7x +9y=17

line 2: 9x +6y=23, or 13.5x +9y=34.5

line2 - line1=(13.5x -7x) + (9y-9y)=34.5 -17

6.5x=17.5

x=17.5/6.5=2.6923076

from line1...y=(17-7x)/9

=(17-18.846153)/9...-1.846153/9= -0.2051281
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