Whats the answer of the problem peter is 3 years older than his sister anna. if times their combined age is 85 . determine annas age

Anna is 41 years old.

Step-by-step explanation:

Easiest way to do this is by building a equation,

Lest say Anna's age is .

Then as Peter is 3 years older than Anna Peter's age should be .

Then the combined ages of the two people is given as 85. So we can write an equation as,

(deducting 3 from both sides of the equation)

As we originally took Anna;s age as

We can say Anna is 41 years old.

b

step-by-step explanation:

given

- 2 (3x + 12y - 5 - 17x - 16y + 4 )

simplify the parenthesis by collecting like terms

= - 2 (- 14x - 4y - 1) ← distribute the parenthesis by - 2

= 28x + 8y + 2 → b