Solving Equations with Variables on Both Sides

The square and equilateral triangle below have the same perimeter. Find the value of x. Then, find the perimeter of each shape. Equation:​ (a)   X = ​ (b)   Perimeter: ​ (c)  

• 2

• 36

• 5

• 42

You rewrote the equation after multiplying the LCD 4 to equal 2x - 20 = 3x + 12 What is the value of x?

Mathematical Equivalence

ON

Solve the equation for the variable

Solve the equation:
7x - 4 = 3 + 8x

• x = 7

• x = -7

• x = 2/7

• x = 11

Solve the equation
4x - 5x + 9 =5x - 9

• x = -3

• x = 9

• x = 3

• x = -9

14p - 8 = 22 + 20p

• -5

• 5

• 30

• -30

2x = x + 3

• 6

• 3

• 2

• x

7x = 3x + 24

• 6

• 10

• 14

• 4

30 + 6t = 11t

• 3

• 5

• 6

• 30

6z = 49 - z

• 49

• -7

• 6

• 7