3 years ago

Solving the following simultaneous equations, 4x - 5y = 17 and x - 5y = 8,

Mathematics

1 answer:

dimaraw [331]3 years ago

7 0

{4x - 5y = 17

{x - 5y = 8

{x = 5y + 8

{4(5y + 8) - 5y = 17

{x = 5y + 8

{20y + 32 - 5y = 17 | - 32

{x = 5y + 8

{15y = -15 | : 15

{y = -1

{x = 5 * (-1) + 8

{x = 3

{y = -1

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