Solving for a Variable

What is the first step in solving for a variable?

• Use inverse operations to undo operations and isolate the variable.

• Identify the operations on this variable and the order in which they are applied.

• Locate the variable you are asked to solve for in the equation.

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If the formula to find the Area of a rectangle is A = l x w, what is the formula to find the Length of a rectangle?

• l = A x w

• l = A / w

• l = A + w

• l = A - w

REVIEW TIME:

What is the acronym used to remember the Order of Operations?

In PEMDAS, what does the E stand for?

• Exponent

• Entertainment

• Equation

• Expression

w=g+7
solve for g

• g=w/7
• g=w+7
• g=7w
• g=w-7

y=x-9
solve for x

• x=9-y
• x=9y
• x=y+9
• x=9/y

M=T-R
solve for T

• T=M+R
• T=M-R
• T=-R-M
• T=RM

Q+R=H
solve for R

• R=Q/H
• R=H+Q
• R=HQ
• R=H-Q

a=3p+1
solve for p

• p=3a+1
• p=(a+1)/3
• p=(a-1)/3
• p=a+3