2 years ago

3x + 4y = 5 X- 3y = -7 Solve by substitution

1 answer:

7 0

X = 3y - 7
3x + 4y = 5

3(3y - 7) + 4y = 5
9y - 21 + 4y = 5

13y - 21 = 5

13y = 26

y = 2

x - 3(2)= -7

x - 6 = -7

x = -1

(-1, 2)

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