You need another equation to make this a linear equation so you can solve for both variables. One equation with two variables is not enough to determine the correct answer.
That equation has no solution. There is no possible number that's equal to 18 more than itself.
To solve an equation with three unknowns, x, y and z, you require 3 independent equations.
5x+y=-7 3x+y=15 8=D
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
Multiply the bottom equation by -1
5x = 80
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.
you cant
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