the father is 30 years older than his son.after 10 years from now ,the sum of their ages is 64.what are their ages right now
2 answers:
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Answer:
Multiply equation by 5 and
by 4
Step-by-step explanation:
Given:
Equations are
To find: constant by which each equation should be multiplied to eliminate the variable in the given system of equations
Solution:
Multiply equation (i) by 5 and (ii) by 4 to get the following equations:
On subtracting these equations, we get
So, the variable gets eliminated
Answer:
When we are dividing exponents, there is this rule:
So, in our case we have this: