Isolating a Variable

What is the variable in the equation? b - 7 = 10

• -7

• 10

• b

Solve for b when
A =1/2bh.

• 2A/h

• 2/(h)

• 2Ah

• Ah/2

ax+r=7
solve for r

• r=7/ax

• r=7-ax

• r=7+ax

• r=7ax

Solve for r
d = rt

• r = d/t

• r = t/d

• r = td

• Not Possible

If you subtract 2 from one side, you have to...

• add 2 to the other side

• subtract 2 from the other side

• multiply 2 on the other side

• divide 2 from the other side

Solve:
2(4x - 3) - 8 = 4 + 2x

• x = 5/3

• x = 3

• x = 1

• x = 2

What is the first step to solve this equation:
11 - 3x = 44

• Add 3 to both sides

• Subtract 11 from both sides

• Add 11 to both sides

• Divide 3 on both sides.

Which equation represents this graph?

What are inverse operations?

• Absolute values

• Opposite operations used in isolating a variable

• Operations used for only inequalities

• Unknown quantity represented by a letter or symbol