exam Maths Puzzle Numerical Ability

Solve by a method of choice

a 3x+4y=-8
b 2x+3y=-3
c 4x+y=5
d 12x+3y=15

Please help me on this equation

Thanks

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exam Other Question

i need 2 slove each equation or formula for the specified variable.

2xy=x+7 for x Can anyone graph these 2 equations on one graph so I can see the properly shaded areas? I never have trouble with one equation, but with two I always seem to shade the wrong areas.

y<= 2x+9
y>= -6x-5