X + Y = 3, 3x - 4y =-19, Find The Answer For X And Y

X + y = 3
3x - 4y =-19

Find the answer for x and y

x + y = 3 ===》 y = 3- x

Substitute in the below equation.

3x - 4y = -19

3x - 4(3-x) = -19

3x - 12 + 4x = - 19

7x = -19 + 12 = -7

x = -7/7 = -1

y = 3- x = 3 - (-1) = 3+1 = 4

x = -1 , y = 4


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