Question

-3x+7y=13 and 3x-4y=-1 substitution method

Answer 1

x = 5, y =4

(5, 4)

Explanation:

-3x + 7y = 13

-3x = 13 - 7y

x = -13/3 + 7y/3

3(-13/3 + 7y/3) - 4y = -1

-13 + 7y - 4y = -1

-13 + 3y = -1

3y = 12

y = 4

3x - 4(4) = -1

3x - 16 = -1

3x = 15

x = 5