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nadezda [96]
3 years ago
15

Sami was asked to solve the following system of equations using substitution.

Mathematics
1 answer:
harina [27]3 years ago
3 0

Answer:

see explanation

Step-by-step explanation:

Sami's error is in the second line of working

2x = 6x - 4  ← correct substitution ( subtract 6x from both sides, Sami has added 6x )

- 4x = - 4 ← correct second line ( divide both sides by - 4 )

x = 1

Substitute x = 1 into either of the 2 equations and evaluate for y

Substituting into the second equation

y = 2x = 2(1) = 2

solution is (1, 2 )

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