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Solve the following system. Verify the solution.
y = 4x – 11
x = 2y – 13




Sagot :

y = 4x - 11
x = 2y - 13

    x = 2(4x - 11)- 13
    x = 2(4x) - 2(11) - 13
    x = 8x - 22 - 13
    x = 8x - 35
- 8x - 8x       
 -7x = -35
 -7       -7
     x = 5
y = 4x - 11
y = 4(5) - 11
y = 20 - 11
y = 9
(x, y) = (5, 9)