To solve this equation, repeatedly do the same thing to both sides of the equation until the variable is isolated on one side of the equal sign and the answer on the other.

-4b + 9 = 7 + 7b
-4b = 7 + 7b - 9
-4b - 7b = 7 - 9
-11b = -2
b = \( \frac{-2}{-11} \)
b = \(\frac{2}{11}\)

The area of a rectangle is equal to its length x width:

a = l x w
a = a x b
a = 2 x 3
a = 6

To combine like terms, add or subtract the coefficients (the numbers that come before the variables) of terms that have the same variable raised to the same exponent.

4a⁵ - 2a⁵ = 2a⁵

A monomial contains one term, a binomial contains two terms, and a polynomial contains more than two terms.

The surface area of a cylinder is 2πr² + 2πrh:

sa = 2πr² + 2πrh
sa = 2π(8²) + 2π(8 x 4)
sa = 2π(64) + 2π(32)
sa = (2 x 64)π + (2 x 32)π
sa = 128π + 64π
sa = 192π