book Maths Puzzle Numerical Ability

20. Solve the following system of linear inequalities by graphing.

3x + 4y < 12 and x + 3y < 6 and x > 0 and y

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book Other Question

the gcf of two numbers is 850 neither number is divisible by the other.what is the smallest that theese numbers could be Use Cramers Rule to solve

2x-3y+z=5
x+y+z=0
4x+2y+4z=4