12
By elimination: x = 3 and y = 0
y=16 x= -4
Subtract by 7x and divide by 2.
(2,-2)
x + 8y = 3 therefore 2x + 16y = 6 (a) 2x + 3y = -7 (b) Subtract (b) from (a): 13y = 13 so y = 1 and x = -5
9y subtract 11 equals 7
By elimination: x = 3 and y = 0
y=16 x= -4
Subtract by 7x and divide by 2.
(2,-2)
x + 8y = 3 therefore 2x + 16y = 6 (a) 2x + 3y = -7 (b) Subtract (b) from (a): 13y = 13 so y = 1 and x = -5
Subtract two from both sides and you are left with X equals -5
U can subtract 18 from each side of the equation.
To solve x + 1.4 = 2, subtract 1.4 from each side; x = 0.6
The elimination method only works with simultaneous equations, hence another equation is needed here for it to be solvable.
16
x=4From superscot85: How you solve it is to subtract 4 from each side leaving x = 4