We have to solve the simultaneous equations
7x-4y=-10 ...(1)
4y=x-2...(2)
add (2) and (1)
=> 7x - 4y + 4y = -10 + x - 2
=> 7x = -12 + x
=> 6x = -12
=> x = -2
Substitute this in (2)
4y=x-2
=> 4y = -2 - 2
=> 4y = -4
=> y = -1
Therefore we get x = -2 and y = -1.
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