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4x -3y = 1
2x -y = -3 --------------> y = 2x +3
4x -3y = 1
4x -3(2x +3) = 1
4x -6x -9 = 1
-2x = 1 +9
-2x = 10
x = 10/-2
x = -5
y = 2x +3
y = 2(-5) +3
y = -10 +3
y = -7
Maka, nilai dari :
3x -2y
= 3(-5) -2(-7)
= -15 +14
= -1
Itu jawabannya.