1. Find all solutions of the system $2x + y = 1$ $3x + 4y = 14$ by substitution method. 2. Find all solutions of the system $4x - 3y = 11$ $8x + 4y = 12$ by elimination method. 3. The perimeter of a rectangle is 70 and its diagonal is 25. Find its length and width.
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To use the substitution method, solve one of the equations for one variable and then substitute that expression into the other equation. From the first equation, solve for y: 2x + y = 1 y = 1 - 2x Substitute y into the second equation: 3x + 4(1 - 2x) = 14 3x + 4 Show more…
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