Question

3/4+x=4/5

3/4-x=-1/2

Answer 1

3/4 + x = 4/5

x = 4/5 - 3/4

x = 1/20

----------------------------

3/4 - x = -1/2

x = 3/4 - (-1/2)

x = 5/4

Answer 2

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

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

\(x=\dfrac{16}{20}-\dfrac{15}{20}\)

\(x=\dfrac{1}{20}\)

------------------------------

\(\dfrac{3}{4}-x=-\dfrac{1}{2}\)

\(x=\dfrac{3}{4}-\left(-\dfrac{1}{2}\right)\)

\(x=\dfrac{3}{4}+\dfrac{1}{2}\)

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

\(x=\dfrac{5}{4}\)