1st equation: 2x + 7y = 2 2nd equation: x + y = -1
find x using the 2nd equation: x + y = -1 x = -y - 1
Substitute x by its value in the 1st equation to find the value of y. 2x + 7y = 2 2(-y-1) + 7y = 2 -2y -2 + 7y = 2 -2y + 7y =2 + 2 5y = 4 y = 4/5
Substitute the value of y in the value of x formula x = -y -1 x = -4/5 - 1 x = -4/5 - (1*5/5) *to have the same denominator x = -4/5 - 5/5 x = (-4-5)/5 x = -9/5
