To solve an equation with three unknowns, x, y and z, you require 3 independent equations.
5x+y=-7 3x+y=15 8=D
That equation has no solution. There is no possible number that's equal to 18 more than itself.
you need to find the value of X first before you can solve this equation
f(x) = x2 + 5x + 1 The roots of this equation are x = -0.2087 and x = -4.7913 (approx).
It is a linear equation in the variable x. You can solve for x using algebra: -5x + 3 = -22 -5x = -25 -x = -5 x = 5
Then x = 6 Therefore; 5x + 3 = 33 First you have to solve the value of X: 8X + 5X + 2X +4X = 114; OR 19x = 114. When you divide both sides of the equation by 19 to solve for X, you find that X = 6. Ergo, 5X + 3 = 30 + 3 = 33; hence, 5X + 3 = 33.
You cannot solve 1 linear equation in 2 unknown variables. You need at least two independent equations.
Multiply the bottom equation by -1
5x = 80
Subtract 3 from each side: 5x = -5 Divide both sides by 5: x = -1 QED
2x+3x-2=0=5x=0+2=5x=2=5x_5=2_5=x=0.4