(a) 2x + 3y - 7 = 0
3x + 2y - 8 = 0
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2x+3y=7 ---- 1
3x+2y=8 -----2
multiply 1 by 3
2x*3+3y*3=7*3
6x+9y=21 ------ 3
multiply 2 by 2
3x*2+2y*2=8*2
6x+4y=16 ------4
subtract 3 and 4
5y = 15
y = 3
Place y in any equation and you get
x= 2/3
y =3
x=2/3
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