Answer:
1 is 3.25 and 2 is
Question
1 answer:
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Answer:
15 years old.
Step-by-step explanation:
Let Jim's age now be one unit (1u).
His uncle's age now is then 4 units.
Jim's age in 10 years = 1u + 10
Jim's uncle's age in 10 years = 4u + 10
In 10 years, Jim's uncle's age will be 20 years more than twice Jim's age.
Twice Jim's age =
Since Jim's uncle's age is 20 years more than this, we can say that his uncle's age is equal to
which is equal to
We found out that Jim's uncle's age in 10 years is 4u+10. Hence
We subtract 10 from both sides:
Therefore
and one unit is 15. Hence, Jim's age now is 15.
<h2>x = 9</h2><h3 />
<u>We know:</u>
- we can add/subtract the same expression to both sides of the equation to get an equivalent equation;
- we can multiply/divide both sides of the equation by the same non-zero number to get the equivalent equation.
<u>Equivalent equations</u> are algebraic equations that have identical solutions.
We have the equation:
<em>multiply bot sides by 3</em>
<em />
<em>divide both sides by 7</em>
<em />