Question

5x - 2y = 7
X - 3y = 4

Answer 1

5x - 2y = 7
X - 3y = 4

x=4+3y

5*(4+3y) - 2y = 7
20 + 15y - 2y = 7
13y = 7 - 20
13y = -13
y=-13/13
y=-1

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

Answer 2

5x + y = 7 + 2
x + y = 9 - 5
x + y = 4

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X - 3y = 4
x - y = 4-3
x - y = 1