exam Maths Puzzle Numerical Ability

how do you find the b and solution of this equation? y=-3/4x

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exam Other Question

Angela needs 20 quarts of 50% antifreeze solution in her radiator. She plans to obtain this by mixing some pure antifreeze with an appropriate amount of 40% antifreeze solution. How many quarts of each should she use? Solve by elimination

x+y=38
175000x+200000y=7200000