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No I have difficulty with elimination

The perimeter of a rectangle is 60 inches (let the length be l and width be w). We then took half the length and also doubled the width and kept the perimeter equal to 60 inches. Write and equation...

Employees of an office ordered lunch from a local store, One day the order was for 4 hamburgers and 3 orders of fries, a total cost of $24. Another day, the order was for 6 hamburgers and l order of...

I tried both elimination and substitution I got -x+27=10 for both solutions what did I do wrong?

Solve the following system by substitution or elimination

2x-4y=3
-3x+6y=7