High grade steel consists of 85% iron and 15% magnese. low grade steel consists of 67% iron and 33% mag ese. nasa orders 500 tons of steel and specifies that it must be in the proportion 80% iron and 20% steel. how many tons of high grade and low grade steel must you melt together to create steel that matches nasa’s requirements?

tons of high steel and tons of low steel

Step-by-step explanation:

Let x be the number of tons of high grade steel and y be the number of tons ow low grade steel needed.

In x tons of high grade steel there are

tons of iron

tons of magnese

In y tons of low grade steel there are

tons of iron

tons of magnese

NASA orders 500 tons of steel, so

and specifies that it must be in the proportion 80% iron and 20% magnese, so

From the first equation,

Substitute it into the second equation:

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step-by-step explanation:

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