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Westkost [7]
3 years ago
6

I could really use some help on this one 1/2(b+14)=b+14÷2

Mathematics
2 answers:
Andrej [43]3 years ago
5 0
1/2(b+14) = b + 14/2 is like writing (1/2).b + (1/2).14 = b + (14/2)
since / has higher preceddence than + and what's inside the parentheses has higher precedence than anything else, here we can't add b to 14 so we have to expand the expression
       b/2 + 7 = b + 7 (we add (-7) on both sides to eliminate 7)
<=> b/2 = b (add (-b) on both sides)
<=> b/2 - b = 0 
<=> b(1/2 - 1) = 0
<=> b.(-1/2) = 0 ((-1/2) multiplied by sthing equals 0, if we multiply two numbers and the result is 0 then at least one of the two is equal to 0, since (-1/2) isn't equal to 0 then b=0)
<=> b = 0
konstantin123 [22]3 years ago
4 0
B+14/2=b+14/2
1
they r equal
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