exam Maths Puzzle Numerical Ability

Could someone show me these on a graph. graphing inequalities.
1) 4x+y>-8
2) x+4y less than or equal to 4
3) 9x+y<7

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exam Other Question

Tell wheather the given value of the varible is a solution of the equation.
41-8x=-6x-23;x=-9.

Thanks for all of your help! The sum of a number, and the difference between 16 and a number, plus 5 is 21. What is the number