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Maths Inequalities
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3x < 9 still not done

÷3 ÷3 opposite of multiply is divide

x < 3 solution now we can graph

x + 6 > -6 given

3

3(x + 6) > (-6) 3 opposite of divide is multiply

3

x + 6 > -18 still not done

x + 6 – 6 > -18 – 6 now opposite of addition is subtraction

x > -24 now graph the solution

-5y – (-15) < -30 given

-5y + 15 < -30 change subtraction to addition

-5y + 15 – 15 < -30 – 15 opposite of addition is subtraction

-5y < -45 not done yet

-5y ÷ -5 < -45 ÷ -5 opposite of multiply is divide

y > 9 have to flip sign and now we have the solution to graph

Slide 10

Now you solve and Graph these two step inequalities

Now you solve and Graph these two step inequalities

x + 6 > -6 -3x + 7 ≠ -26 -10x – (-10) < 100 y – (-7) < 15

3 -2

x > -24 x ≠ 11 x < 11 y < -37

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