subrena subrena

29-02-2016
Mathematics

Answered

Three sets of a sum of a number and four are added to the sum of seven times the same number and thirteen

Verified Answer :

apologiabiology apologiabiology

29-02-2016

so
sum means add
[3 times (x+4)]+[7 times (x+13)]

distribute
a(b+c)=ab+ac
3(x+4)=3x+12

7(x+13)=7x+13

now we have
3x+12+7x+13
add lk etmers
10x+25

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