An isosceles triangle has two sides of equal length. An equilateral triangle has three sides of equal length. In a right triangle, two sides meet at a right angle.

You need to find the value of c so solve the first equation in terms of x:

-c + x = -6
x = -6 + c

then substitute the result (-6 - -1c) into the second equation:

8c - 4(-6 + c) = -2
8c + (-4 x -6) + (-4 x c) = -2
8c + 24 - 4c = -2
8c - 4c = -2 - 24
4c = -26
c = \( \frac{-26}{4} \)
c = -6\(\frac{1}{2}\)

A circle is a figure in which each point around its perimeter is an equal distance from the center. The radius of a circle is the distance between the center and any point along its perimeter. A chord is a line segment that connects any two points along its perimeter. The diameter of a circle is the length of a chord that passes through the center of the circle and equals twice the circle's radius (2r).

The volume of a cube is height x length x width:

v = h x l x w
v = 9 x 6 x 8
v = 432

To solve this equation, isolate the variable for which you are solving (b) on one side of the equation and put everything else on the other side.

-7b - 5y = 5b - 6y + 4
-7b = 5b - 6y + 4 + 5y
-7b - 5b = -6y + 4 + 5y
-12b = -y + 4
b = \( \frac{-y + 4}{-12} \)
b = \( \frac{-y}{-12} \) + \( \frac{4}{-12} \)
b = \(\frac{1}{12}\)y - \(\frac{1}{3}\)