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Use the best method to solve each equation. Write answer as an ordered pair. Check your answers. 3x-y=18 Y=x-4

Sagot :

Answer:

Solution → (7, 3)

Step-by-step explanation:

Given system of equations is,

3x - y = 18 -------(1)

y = x - 4 ------- (2)

Substitution method is the best method to solve the given system of equations.

Substitute the value of y from equation (2) to equation (1)

3x - (x - 4) = 18

3x - x + 4 = 18

2x = 18 - 4

2x = 14

x = 7

From equation (2)

y = 7 - 4

y = 3

Solution of the system of equations will be (7, 3).

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