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2x+3y=5 / 4 𝑥 − 𝑦 = 3
x=1 , y=1
6x+y=-8 / -4x-5y=-12
x=-2 , y=4
-3x+9y=36 / 7x-8y=-19
x=3 , y=5
2x+3y=19 / 5x+4y=30
x=2 , y=5
what is Cramer's rule ?
12x-9y=-5 / 4x-3y=11
no unique solution
