Solve the system by substitution.
3x + y = 19
-6x – 5 = y

A graph can be used to show the solution for a system of two linear equations. ... You solve one equation for one variable and then substitute this expression into ... Problem. Solve for x and y. y = 3x + 6. −2x + 4y = 4. y = 3x + 6. −2x + 4y = 4 ... x = 5. Simplify and solve the equation for x. 3x + y = 19. 3(5) + y = 19. 15 + y = 19.

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answer: a video game has three difficulty levels: easy, medium, and expert. the game's scoring works in such a way that a player has to score a fixed number of points to advance to the next level, and then the scoring starts over. the total score needed to clear all three difficulty levels is 7,500. two times the number of points needed to clear the easy level is 500 more than the number of points needed to clear the medium level. twice the number of points needed to clear the medium difficulty level is 1,500 more than the number of points needed to clear the expert level. if x, y, and z represent the easy, medium, and expert levels, respectively, and a is the coefficient matrix of the system of equations modeling this situation, identify the inverse matrix, a-1, and the solution matrix, x, of the system of equations.

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