exam Maths Puzzle Numerical Ability

Solve the system by substitution.
x + 4y = -4
3x - 3y = -12

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exam Other Question

Solve this system of inequalities graphically.

3x - y is less than or equal to 6
x is greater than or equal to 1
y is less than or equal to 3 I also wanted to thank everyone that has helped me with my many problems, I am so bad with math. I also want to thank the ones that explain how things are done or how you "come up"