U can subtract 18 from each side of the equation.
7x + y = 4y = 4 - 7x
2x + y = 3 and y = 5x - 11 1) Plug the second equation for y into the first 2) 2x + (5x - 11) = 3 3) Solve for X 4) 7x = 14 5) x = 2 6) Plug X into either equation to get Y 7) 2(2) + y = 3 8) y = -1
y=±√15
x+y=27 x=14 27-14=y y=13
18+y=32 y=14
2x-y=14, x=0 First, substitute 0 in place of x. (2x0)-y=14 Multiply 2 times 0. 0-y=14 That gives you... -y=14 Because we are solving for y, and y must be positive, divide each side by -1. -y/-1=14/-1 And, our result... y=-14
U can subtract 18 from each side of the equation.
-y + y equals 0.
18
For y - 2y - 3y equals 0, y equals 0.
y = -1.4
b = y - mx.
y= -2x
y - 3 = 0 y = 3
X + y = 8 x - y = 6 add equations to eliminate y 2x = 14 x = 7 substitute 7 + y = 8 y = 1
y-14 = 16 y = 16+14 y = 30