tshamya05 tshamya05

24-04-2020
Mathematics

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X-4y=7 -6x-3y=12 how do i solve by substitution

Respuesta :

Anisatunizzati Anisatunizzati

26-04-2020

Answer:

x = 15

y = 2

Step-by-step explanation:

X-4y=7 | ×6 |

-6x-3y=12 | ×1 |

6x - 24y = 42

-6x - 3y = 12

___________+

27y = 54

y = 54/27

y = 2

x - 4y = 7

x - 4(2) = 7

x - 8 = 7

x = 7 + 8

x = 15

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