21. >
22. Distributive Property
Just go through it phrase by phrase by phrase - one step at a time.
2*( )
2*(x - 7)
Answer:
x = 15
Step-by-step explanation:
We know that 4x° + 8x° make a straight angle of 180°.
4x° + 8x° = 180°
12x° = 180°
12x = 180
x = 180/12 = 15
Combining like terms would be defined as multiplying each term in a set of parentheses by the number outside of the parentheses.