In a party decorations total r balloons were used. There will b blue balloons, twice as many green balloons, and the rest of the balloons were yellow. How many yellow balloons were used?

no

step-by-step explanation:

2-7=-5

7-2=5

when you combing like terms for ech expression, 5 and -5. these numbers are not equal to each other.

for this case we must apply distributive property to the following expression:

the distributive property states that:

then, when applying the property we have to multiply the -2 for each term within the parenthesis:

5

step-by-step explanation: