List the order to write and solve the equation for x:
Image of a Right Triangle with a 45 degree angle
(18x + 21)
x = _____
(5 points)
1. Combine like terms: 45 + 90 + 21
2. Subtract 156 from both sides of the equation
3. Divide both sides of the equation by 8
4. Write the equation ∠1 + ∠2 + ∠3 = 180°
5. x = 3
1. Combine like terms: 18x + 21
2. Subtract 21 from both sides of the equation: 18x = 21
3. Divide both sides of the equation by 18: x = 21/18
4. Simplify: x = 7/6