Lesson 7: How to Solve Basic Algebraic Equations

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Division of two quantities is expressed as the ? of those two quantities.

quotient

Select the correct Ohm's Law formula that will solve for E when only I and R are known

E = I x R

Given E = I x R and P = E x I, select the formula that will solve for E when only I and P are known.

E = P/I

Given E = I x R and P = E x I, select the formula that will solve for E when only R and P are known.

E = the square root of (P x R)

If a person multiplies one side of an equation by five, what must he or she do to the other side of the equation?

Multiply by five

Change the following rule into a formula. The power in watts (P) in a circuit is equal to the voltage (E) multiplied by the current (I).

P = E x I

Change the following rule into a formula. The resistance in ohms (R) in a circuit is equal to the voltage (E) divided by the current (I)

R = E / I

Given E= I x R and P = E x I, select the formula that will solve for R when only E and P are known.

R = E^2 / P

Given E = I x R and P = E x I, select the formula that will solve for R when only I and P are known.

R = P / I^2

Given E = I x R, select the formula that will solve for R when only E and I are known.

R= E/I

To solve the equation below, a person must ? each side of the equation. A - 7 = 17

add 7 to

? is expressed as the sum of a given number of quantities

addition

Subtraction is expressed as the ? two quantities.

difference between

To solve this equation below a person must ? each side of the equation by ? 15Y = 90

divide / 15

A ? is a shorthand method for writing a mathematical rule

formula

To solve for R in the equation below, a person must ? each side of the equation by ? R/5 = 6

multiply / 5

The multiplication of two or more quantities may be expressed as the ? of the same quantities.

product

To solve the equation below, a person must ? each side of the equation. A + 17 = 20

subtract 17 from

The numerical value of the quantities expressed by the numbers and letters on the left side of the equation (equal sign) is equal to the value of the quantities expressed by the numbers and letters on the right side of the equation. the preceding sentence best describes ?

what the equal sign actually shows about the two sides of any equation


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