Intro to Solving Systems of Equations using Substitution

Solving Using Substitution where the lines intersect. So the solution could bewhich of the following? A solution to a system of equations is A single point (one ordered pair) No solution (parallel lines; they don't intersect) Infinite # of Solutions (same line) all of the above Solve by substitution. Fill in the blanks. So, the solution is { 2x + 3y = 21 x = 9 ( 18 - + 3y = 21 - 2 + 3y = 21 ( , 18 ? 18 ? + 3y = 21 ) ) 3y = y = 18 ? + 3y = 21 Solve by substitution. Fill in the blanks. So, the solution is { y = 10 y = 4x + 2 ( = 4x + 2 10- = 4x + 2 - , 2 ? ) = 4x = x 2 ? Solve the system. { 2x - y = 1 y = 10 Answer: ( , ) Solve the system. { 4x -2y = 10 x = 4 Answer: ( , ) |

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