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2x+3y=4 \*(-2)
5x+6y=7
-4x-6y=-8
-4x+5x=-8+7
x=-1
2*(-1)+3y=8
3y=8+2
3y=10
y=10\3
y=3.33
2x+3y=4 |x 5
-10x-12y=-14
10x+15y= 20
_____________
3y=6 |:3
y=2
2x+3.2=4
2x+6=4
2x=-2 |:2
x=-1
y=2