Question 150192
3x-2y=4
2x-5y=21 
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Multiply eqn 1 by 2, and eqn 2 by 3
6x  -4y = 8
6x -15y = 63
Subtract 2 from 1
0x +11y = -55
y = -5
Sub for y into either eqn
3x -2*(-5) = 4
3x + 10 = 4
3x = -6
x = -2
Both check