Question

2x-y=40
3x-y=25
solve the equation in substitution method​

Answer 1

Answer:

-1x= 15

x = -15

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Answer 2

Answer:

x = -15

y = -70

Step-by-step explanation:

2x - y = 40

2x = 40 + y

2x - 40 = y --------(1)

3x - y = 25 -------(2)

Put (1) in (2)

3x - (2x - 40) = 25

3x - 2x + 40 = 25

1x = 25 - 40

x = -15 --------(3)

Put (3) in (1)

2(-15) - 40 = y

-30 - 40 = y

-70 = y

y = -70