a)
x . 3/4 = 11/4
x = 11/4 : 3/4
x = 11/3
b)
18/15 + x = 4/15
x = 4/15 - 18/15
x = -14/15
c)
x + 8 = -21
x = -21 - 8
x = -29
d)
3/5 x - 1/2 = 1/7
3/5x = 1/7 + 1/2
3/5x = 9/14
x = 9/14 : 3/5
x = 15/14
a,
\(x=\dfrac{11}{4}:\dfrac{3}{4}\)
\(x=\dfrac{11}{4}\times\dfrac{4}{3}\)
\(x=\dfrac{11}{3}\)
b,
\(x=\dfrac{4}{15}-\dfrac{8}{15}\)
\(x=-\dfrac{4}{15}\)
c,
\(x=-21-8\)
x = - 29
d,
\(\dfrac{3}{5}x=\dfrac{1}{7}+\dfrac{1}{2}\)
\(\dfrac{3}{5}x=\dfrac{2}{14}+\dfrac{7}{14}\)
\(\dfrac{3}{5}x=\dfrac{9}{14}\)
\(x=\dfrac{9}{14}:\dfrac{3}{5}\)
\(x=\dfrac{9}{14}\times\dfrac{5}{3}\)
\(x=\dfrac{15}{14}\)
