exam Maths Puzzle Numerical Ability

You have to solve the systems of linear inequalities by graphing.

1) y < 6 2) x + y < 2 3) x < 7 4) y < -5x + 6
y > 3 x + y > 5

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exam Other Question

do I multiply entire equation by lcd even though it is only a subtraction question? need help could u explain each step thanks

2x-y=6
x=13-2y equations by substitution

thank you so much homework