Question

Answer 1

a)

\(\dfrac{4}{7}+x=\dfrac{5}{3}\)

\(x=\dfrac{5}{3}-\dfrac{4}{7}\)

\(x=\dfrac{35}{21}-\dfrac{12}{21}\)

\(x=\dfrac{23}{21}\)

b)

\(\dfrac{1}{2}+x=\dfrac{1}{4}\)

\(x=\dfrac{1}{4}-\dfrac{1}{2}\)

\(x=\dfrac{1}{4}-\dfrac{2}{4}\)

\(x=-\dfrac{1}{4}\)

c)

\(\dfrac{2}{3}+x=\dfrac{4}{7}\)

\(x=\dfrac{4}{7}-\dfrac{2}{3}\)

\(x=\dfrac{12}{21}-\dfrac{14}{21}\)

\(x=-\dfrac{2}{21}\)

Answer 2

a)\(x=\dfrac{35}{21}-\dfrac{12}{21}=\dfrac{23}{21}\)
b)\(x=\dfrac{1}{4}-\dfrac{2}{4}=-\dfrac{1}{4}\)
c)\(x=\dfrac{12}{21}-\dfrac{14}{21}=-\dfrac{2}{21}\)