2. Fundamentals in Algebra

If 16 is 4 more than 4x, find 5x - 1.

$$Find\ X:\ \frac{x+1}{3}+\frac{2x}{4}=47-2x$$

Find the value of x in the equations:
$$10\left[\frac{A}{x}+\frac{A}{y}\right]=A$$ and $$2\left[\frac{3A}{x}-\frac{4A}{y}\right]=A$$

Find the values of x and y from the equations:

$$x-4y+2=0$$
$$2x+y-4=0$$

Solve for the value of x and y
$$4x+2y=5$$
$$13x-3y=2$$

Solve the simultaneous equations:

$$2x^2-3y^2=6$$

$$3x^2+2y^2=35$$

Find the value of w in the following equations:

$$3x-2y+w=11$$

$$x+5y-2w=-9$$

$$2x+y-3w=-6$$

Solve for the value of x.

$$2x-y+z=6$$

$$x-3y-2z=13$$

$$2x-3y-3z=16$$

Solve the simultaneous equations:

$$x+y=-4$$

$$x+z-1=0$$

$$y+z+1=0$$

Multiply the following: $$\left(2x+5y\right)\left(5x-2y\right)$$